From patchwork Fri Jan 13 19:29:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4D206C677F1 for ; Fri, 13 Jan 2023 19:30:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D57110EABC; Fri, 13 Jan 2023 19:30:48 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id D98F510EABC; Fri, 13 Jan 2023 19:30:41 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id h26so11224808ila.11; Fri, 13 Jan 2023 11:30:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=b1o5vBUqYZImz4NHOXgCRklT6MZZtgIKbNelpVgr1rc=; b=O/G/GtrLDkS5318MosjlluvMht6s+j6sda3zFLrbXEaHuhdy3Ep0v0dq4H3SemVWco mbHU/PLBxTIyQr+HKWkeWhY4F15ONxe3ZlSHXvkjdXkVdgIfMREA53VU9Jj14bpejFKb bG97tXcxSdnDGjeac8amfJc7ZA1EBBtZq/ZTtgGdh9eDV7Op2JPsuqt6Nm6/s8aZg4O2 FCfHXEr5/orMZzKROvde4QwLWIJ9SONF9wRfIiL8omXe6zRYbhK7wZv6Z8LYhmBjLIvD QLMyIcPqJT6/6oY2ckvy7JVGWZfAFeSeLsASj6eYHjBcqYVZjVmtTWWnSN+jJDwI/oIh 1txw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=b1o5vBUqYZImz4NHOXgCRklT6MZZtgIKbNelpVgr1rc=; b=Nok0g7Nyv9po1Da9AZBZ/fvDR7kjqEROB9rt5MUVghoiA86+jgLYaDTNlX7Vq/i2RR k13zdhLclX4UWbhwTmgsDLxtcno3dzoNDTPYlnLRhtqx4lHphBvGSn6RmcPGZbx1BdHo 9C6+FfPgavQ0fwORolxq3jYdwmG7khuLF7SaS6CumSRi5jN2lOma0ew8twpVXdx1PjsD hHK8qizeMwqOQq6xGv5YHsdF/dr+hVvHfu5eftb6YELE8XAh+fj3TC8f4mGBDHkWsdsa iq9VD9yAQtO4jMm9/zBAqklWAK7THg6OpRIOxF096MhzR0624e43h5eee7/1rxdavSb/ Yi8w== X-Gm-Message-State: AFqh2krOlWGmk6TWicxZEwx0haQxkJCKJb1/lA7jHEXvRgk/05XoWFOR P/VoMpSjUupvVHCgk4QEIVc= X-Google-Smtp-Source: AMrXdXvjHFCUqwgnJISIfjiy5EhLkeG2cldtPBa2NhmQBpy3xoVlCgCyWUpN297fbq27qZozSPjmgQ== X-Received: by 2002:a92:1306:0:b0:30d:bd88:8a2e with SMTP id 6-20020a921306000000b0030dbd888a2emr9127064ilt.20.1673638241114; Fri, 13 Jan 2023 11:30:41 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:40 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 01/20] test-dyndbg: fixup CLASSMAP usage error Date: Fri, 13 Jan 2023 12:29:57 -0700 Message-Id: <20230113193016.749791-2-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" more careful reading of test output reveals: lib/test_dynamic_debug.c:103 [test_dynamic_debug]do_cats =pmf "doing categories\n" lib/test_dynamic_debug.c:105 [test_dynamic_debug]do_cats =p "LOW msg\n" class:MID lib/test_dynamic_debug.c:106 [test_dynamic_debug]do_cats =p "MID msg\n" class:HI lib/test_dynamic_debug.c:107 [test_dynamic_debug]do_cats =_ "HI msg\n" class unknown, _id:13 That last line is wrong, the HI class is declared. But the enum's 1st val (explicitly initialized) was wrong; it must be _base, not _base+1 (a DECLARE_DYNDBG_CLASSMAP param). So the last enumeration exceeded the range of mapped class-id's, which triggered the "class unknown" report. Basically, I coded in an error, and forgot to verify it and remove it. RFC: This patch fixes a bad usage of DECLARE_DYNDBG_CLASSMAP([1]), showing that it is too error-prone. As noted in test-dynamic-debug.c comments: * Using the CLASSMAP api: * - classmaps must have corresponding enum * - enum symbols must match/correlate with class-name strings in the map. * - base must equal enum's 1st value * - multiple maps must set their base to share the 0-62 class_id space !! * (build-bug-on tips welcome) Those shortcomings could largely be fixed with a __stringify_list (which doesn't exist) used in DEFINE_DYNAMIC_DEBUG_CLASSMAP(), on __VA_ARGS__ a 2nd time. Then, DRM would pass DRM_UT_* ; all the categories, in order, and not their stringifications, which created all the usage complications above. [1] name changed later to DYNDBG_CLASSMAP_DEFINE Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 8dd250ad022b..a01f0193a419 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -75,7 +75,7 @@ DD_SYS_WRAP(disjoint_bits, p); DD_SYS_WRAP(disjoint_bits, T); /* symbolic input, independent bits */ -enum cat_disjoint_names { LOW = 11, MID, HI }; +enum cat_disjoint_names { LOW = 10, MID, HI }; DECLARE_DYNDBG_CLASSMAP(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, "LOW", "MID", "HI"); DD_SYS_WRAP(disjoint_names, p); From patchwork Fri Jan 13 19:29:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101526 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9FDE6C677F1 for ; Fri, 13 Jan 2023 19:30:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1C0910EABD; Fri, 13 Jan 2023 19:30:48 +0000 (UTC) Received: from mail-il1-x12c.google.com (mail-il1-x12c.google.com [IPv6:2607:f8b0:4864:20::12c]) by gabe.freedesktop.org (Postfix) with ESMTPS id A1FF910EABC; Fri, 13 Jan 2023 19:30:44 +0000 (UTC) Received: by mail-il1-x12c.google.com with SMTP id a3so5290001ilp.6; Fri, 13 Jan 2023 11:30:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h7E8mOROiZFak1hyuDLHZO4dWBPRJx+AzyZtVyPnB1c=; b=NFGI8G4J3JHcHWVJJCje1tn4wX4/c1V8buxhNGuHGLE8ioehj37HI2hvsXan7Iauj1 bWiQH6MGv9cOKH5nmWV6A+0M/JOqI0hhwUzgAIHVc5Kq0RqrRPFL5FJCLxbDqrdlIy+y UUz3LreilLsYdvT8RHh+wNBRnYKAmYuInZ33RrJREgW7fnV8RvLua8XDtq3KyvlUrm4h 8nNE8/1pZpXH4qvP22FNR5anq3q07NAS+Qk4kXZcZ8Y+PIru3803BdzsGR/Fy6TJXhBo 8GDAghcOV4YeYkquVwMQN64IO3O1+wd5nUVrgmYkTBsezoi8F8QrkhWN/Gv4GLGp7Xhi DtHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h7E8mOROiZFak1hyuDLHZO4dWBPRJx+AzyZtVyPnB1c=; b=WY1wgCnX9/fsn7brIKdx5VVPmdfgVmL3UJImsglFoESKy0MYSeBebkeOv0M6820598 HJSqe/p1WpQ8xQHN8OBSIJXrpbkAK5B4H+cxFzcxrqchKUSGR4drCMOD6P8O0RlULiaA D0MfNaDuwCuSiPbiVN5SWLKctRmuLsSyiXtG6yGLdSsU9DUfMooqoMzpvaW0ebtfSFlF Voq+DNmFxl5hx009XfaG+jeVCrzzefgAJ4zBl2PY3LYYV4HNV3s6a5MAZT3DGLwOpblU P68ksK7CLlyGLGq8Y6DvF/ICgAPMfU1Q0wbZSYuiSdjSPPu6UF9JABrRjEj7Ge8ezq2K g02g== X-Gm-Message-State: AFqh2kpA5Gz2h3a0NU+XacEvxd4K1Dtk9mvhZ5C4q98cDtvrO4A/itjE X18eUIKNDuifz1v3A4sTA18= X-Google-Smtp-Source: AMrXdXvPH129dWnUpJa8DkRWJYweDtctq7cHertzhMd9iaMmt2QU3y+ioZ4YvEafYXsPdjHT7P3j0w== X-Received: by 2002:a92:d10f:0:b0:305:dee9:bcc6 with SMTP id a15-20020a92d10f000000b00305dee9bcc6mr53274901ilb.17.1673638243665; Fri, 13 Jan 2023 11:30:43 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:43 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 02/20] test-dyndbg: show that DEBUG enables prdbgs at compiletime Date: Fri, 13 Jan 2023 12:29:58 -0700 Message-Id: <20230113193016.749791-3-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Dyndbg is required to enable prdbgs at compile-time if DEBUG is defined. Show this works; add the defn to test_dynamic_debug.c, and manually inspect/verify its effect at module load: [ 15.292810] dyndbg: module:test_dynamic_debug attached 4 classes [ 15.293189] dyndbg: 32 debug prints in module test_dynamic_debug [ 15.293715] test_dd: init start [ 15.293716] test_dd: doing categories [ 15.293716] test_dd: LOW msg ... [ 15.293733] test_dd: L6 msg [ 15.293733] test_dd: L7 msg [ 15.293733] test_dd: init done NOTES: As is observable above, define DEBUG enables all prdbgs, including those in mod_init-fn, and more notably, the class'd ones (callsites with non-default class_ids). This differs from the >control interface, which in order to properly protect a client's class'd prdbgs, requires a "class FOO" in queries to change them. If this sounds wrong, note that the DEBUG is in the module source file, and is thus privileged. This yields an occaisional surprise; the following disables all the compile-time enabled plain prdbgs, but leaves the class'd ones enabled. :#> modprobe test_dynamic_debug dyndbg==_ Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index a01f0193a419..89dd7f285e31 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -8,6 +8,8 @@ #define pr_fmt(fmt) "test_dd: " fmt +#define DEBUG /* enable all prdbgs (plain & class'd) at compiletime */ + #include /* run tests by reading or writing sysfs node: do_prints */ From patchwork Fri Jan 13 19:29:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101527 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2B07EC3DA78 for ; Fri, 13 Jan 2023 19:31:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 294FE10EACB; Fri, 13 Jan 2023 19:30:52 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6537210EABC; Fri, 13 Jan 2023 19:30:45 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id h26so11224873ila.11; Fri, 13 Jan 2023 11:30:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Nz9NKAauP/PeH1eSVwu5400XM3j60fkrKR5bmVXqMKE=; b=GSt1DnSmm5a/90jSzfEJvZpJyfRWB7OnJeRYXqyJpjzf733t9dnUOXIihiNNzOvgqD kGXVi0xyWEj4frqJrWxGqtVzZMdO1X3xIx/HuheURTuNWaiq8pAqOu95qAtcfIYsDcsu 9RS2udBB4ainP8SMk2mbdIrB8BRCmT9mhbxHX6m1nQuMyLZrFW/xSBQE/cfFBuT1pqrr 5eJLE7FKvhm7w4KogXFJS0ZAZPAKzAmz21eqiRTmC622YuvcFEiI93RaKa3ZkTYFDsFR ypB1FxvWoVHNRo9h9XR2R+K3xKpiRW3bsEGd53xRiGYAQC9gaSneh6VZbGVz2Di1QU8s Yiaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Nz9NKAauP/PeH1eSVwu5400XM3j60fkrKR5bmVXqMKE=; b=FypZcUzQ6L847pDAcAGVbM4vep7tL4X2e09RdwOqtTffFDboOtR7/JC76X3tpSvEnO 40HZ8fg9MC8quutywVzXTiDXrXzO/A76tDJMoJIfDHkV3yvu89c1QOJx9st5GywYFwd+ tADa7NiWjqt6VlxDhbNriJwhZP+0w3AJMQMTnxSCeGalNY4zr8Gjv6t0YvilqRon09H4 FgIpPunxvj4I3YtK1Lq8V4lnMoWUl+AvfZ3UwR6VKaVYXyzxUrhYnxTnv9LVohDj0PJ6 o5lePb4qCbwZLRmseY40j5wnZaR++GAR2kkL+FyY6fzGpis/0Opixbo1o0T69OkpGCK9 YEpA== X-Gm-Message-State: AFqh2kpJuhSC4a8fNrKwEM6NC6DiPUs6PBYzc9hkpHaDwqv7NiNEyK9s 6XLSdeC1si5OnDKACQJNXg8= X-Google-Smtp-Source: AMrXdXsxeahSbDCjG3t63tdUHZlf5sEAItFixkYWM6V5EpvW+2fQHkNmZL2iMpL7W0ZzQI8DuHHzBA== X-Received: by 2002:a05:6e02:1d14:b0:30e:e070:cae9 with SMTP id i20-20020a056e021d1400b0030ee070cae9mr2240777ila.28.1673638245004; Fri, 13 Jan 2023 11:30:45 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:44 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 03/20] dyndbg: replace classmap list with a vector Date: Fri, 13 Jan 2023 12:29:59 -0700 Message-Id: <20230113193016.749791-4-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Classmaps are stored/linked in a section/array, but are each added to the module's ddebug_table.maps list-head. This is unnecessary; even when ddebug_attach_classmap() is handling the builtin section (with classmaps for multiple builtin modules), its contents are ordered, so a module's possibly multiple classmaps will be consecutive in the section, and could be treated as a vector/block, since both start-addy and subrange length are in the ddebug_info arg. So this changes: struct ddebug_class_map drops list-head link. struct ddebug_table drops the list-head maps, and gets: classes & num_classes for the start-addy and num_classes, placed to improve struct packing. The loading: in ddebug_attach_module_classes(), replace the for-the-modname list-add loop, with a forloop that finds the module's subrange (start,length) of matching classmaps within the possibly builtin classmaps vector, and saves those to the ddebug_table. The reading/using: change list-foreach loops in ddebug_class_name() & ddebug_find_valid_class() to walk the array from start to length. Also: Move #define __outvar up, above an added use in a fn-prototype. Simplify ddebug_attach_module_classes args, ref has both addy,len. This isn't technically a bugfix, but IMO simplifies later fixes for the chicken-egg post-init enablement regression. Signed-off-by: Jim Cromie --- include/linux/dynamic_debug.h | 1 - lib/dynamic_debug.c | 61 ++++++++++++++++++----------------- 2 files changed, 32 insertions(+), 30 deletions(-) diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 41682278d2e8..bf47bcfad8e6 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -81,7 +81,6 @@ enum class_map_type { }; struct ddebug_class_map { - struct list_head link; struct module *mod; const char *mod_name; /* needed for builtins */ const char **class_names; diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 009f2ead09c1..823190094350 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -45,10 +45,11 @@ extern struct ddebug_class_map __start___dyndbg_classes[]; extern struct ddebug_class_map __stop___dyndbg_classes[]; struct ddebug_table { - struct list_head link, maps; + struct list_head link; const char *mod_name; - unsigned int num_ddebugs; struct _ddebug *ddebugs; + struct ddebug_class_map *classes; + unsigned int num_ddebugs, num_classes; }; struct ddebug_query { @@ -146,13 +147,15 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg) query->first_lineno, query->last_lineno, query->class_string); } +#define __outvar /* filled by callee */ static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table const *dt, - const char *class_string, int *class_id) + const char *class_string, + __outvar int *class_id) { struct ddebug_class_map *map; - int idx; + int i, idx; - list_for_each_entry(map, &dt->maps, link) { + for (map = dt->classes, i = 0; i < dt->num_classes; i++, map++) { idx = match_string(map->class_names, map->length, class_string); if (idx >= 0) { *class_id = idx + map->base; @@ -163,7 +166,6 @@ static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table cons return NULL; } -#define __outvar /* filled by callee */ /* * Search the tables for _ddebug's which match the given `query' and * apply the `flags' and `mask' to them. Returns number of matching @@ -1107,9 +1109,10 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos) static const char *ddebug_class_name(struct ddebug_iter *iter, struct _ddebug *dp) { - struct ddebug_class_map *map; + struct ddebug_class_map *map = iter->table->classes; + int i, nc = iter->table->num_classes; - list_for_each_entry(map, &iter->table->maps, link) + for (i = 0; i < nc; i++, map++) if (class_in_range(dp->class_id, map)) return map->class_names[dp->class_id - map->base]; @@ -1193,30 +1196,31 @@ static const struct proc_ops proc_fops = { .proc_write = ddebug_proc_write }; -static void ddebug_attach_module_classes(struct ddebug_table *dt, - struct ddebug_class_map *classes, - int num_classes) +static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug_info *di) { struct ddebug_class_map *cm; - int i, j, ct = 0; + int i, nc = 0; - for (cm = classes, i = 0; i < num_classes; i++, cm++) { + /* + * Find this module's classmaps in a subrange/wholerange of + * the builtin/modular classmap vector/section. Save the start + * and length of the subrange at its edges. + */ + for (cm = di->classes, i = 0; i < di->num_classes; i++, cm++) { if (!strcmp(cm->mod_name, dt->mod_name)) { - - v2pr_info("class[%d]: module:%s base:%d len:%d ty:%d\n", i, - cm->mod_name, cm->base, cm->length, cm->map_type); - - for (j = 0; j < cm->length; j++) - v3pr_info(" %d: %d %s\n", j + cm->base, j, - cm->class_names[j]); - - list_add(&cm->link, &dt->maps); - ct++; + if (!nc) { + v2pr_info("start subrange, class[%d]: module:%s base:%d len:%d ty:%d\n", + i, cm->mod_name, cm->base, cm->length, cm->map_type); + dt->classes = cm; + } + nc++; } } - if (ct) - vpr_info("module:%s attached %d classes\n", dt->mod_name, ct); + if (nc) { + dt->num_classes = nc; + vpr_info("module:%s attached %d classes\n", dt->mod_name, nc); + } } /* @@ -1250,10 +1254,9 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, dt->num_ddebugs = di->num_descs; INIT_LIST_HEAD(&dt->link); - INIT_LIST_HEAD(&dt->maps); if (di->classes && di->num_classes) - ddebug_attach_module_classes(dt, di->classes, di->num_classes); + ddebug_attach_module_classes(dt, di); mutex_lock(&ddebug_lock); list_add_tail(&dt->link, &ddebug_tables); @@ -1342,8 +1345,8 @@ static void ddebug_remove_all_tables(void) mutex_lock(&ddebug_lock); while (!list_empty(&ddebug_tables)) { struct ddebug_table *dt = list_entry(ddebug_tables.next, - struct ddebug_table, - link); + struct ddebug_table, + link); ddebug_table_free(dt); } mutex_unlock(&ddebug_lock); From patchwork Fri Jan 13 19:30:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101529 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 61792C678D4 for ; Fri, 13 Jan 2023 19:31:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DCED810EAC7; Fri, 13 Jan 2023 19:30:52 +0000 (UTC) Received: from mail-il1-x12a.google.com (mail-il1-x12a.google.com [IPv6:2607:f8b0:4864:20::12a]) by gabe.freedesktop.org (Postfix) with ESMTPS id CB19F10EABC; Fri, 13 Jan 2023 19:30:46 +0000 (UTC) Received: by mail-il1-x12a.google.com with SMTP id f8so5148008ilj.5; Fri, 13 Jan 2023 11:30:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qWKFQeFAxn+ZOh646ePMJ4LTdlatpOHry6TwdNzo/6o=; b=WEB/QiC1kblSr7YALV/jSJKcpvQyT+QwF75uAuHFqKiFVyfrr6ULMAMYbydn11q3hm TAy34JZjMpq5xguKevoGRXkAuvU0F7UTUG0c6x8jkt6c5c4vrpeTkKwPEvCTxVCj++12 F8o0rMCsqW6UZmU9HA5CAloAMNJXcKTmpne50mvxlHK6xfXOha/3NpcP/f0rdQzu5TPX TndCaBh4jJFy0SYsicMpVbhCxxv+/r0JXKJtlujyFx7bZYUv//inVAhg7ex/x+gpwC/7 pfuN+ZCYJs4oitXOS1/lfZpiOfrD43+loQU0KYn2TlORbhuNuSBa7zQ29IjB6U1OCsG6 XM/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qWKFQeFAxn+ZOh646ePMJ4LTdlatpOHry6TwdNzo/6o=; b=mJIftccRWjjwstOxyCecRhvMzxf0ezwDGRA07FoZBd1Z08bE6o6HIUuH9hL2UzDG58 0M9MkSHk6UBwU3SBVbsgQ/HQs/BKt+/Eg65W/NVg8vuDMkxdFH2FyOfPK/jXicrFQklx ecBm2bA5SzW2mZUwR/NRuAASPzuFfVe31Z0iMrYuChPieG713e3HfxXgJb7+hyemlDmT b/4uZf1HudCj1DJDOPKkuIEdmWRl3NUMLozjDddmmTPuVuv0wRa1px2hyI10fOgeL4Uq HMc9U7/FAO1GCEzMzmPhvl/rlBFy3Kxs9LB/6fvtz88xBaZlU7ekcYNFO38pJ6cMGTv/ +crw== X-Gm-Message-State: AFqh2krec4nzWusghkDIAa+MfkiyCiwZbp0lrng/DE58XTk4rLBgEoRp sZN6M+HY3tuV3TajmIMMfX0= X-Google-Smtp-Source: AMrXdXuebkiSDHExojLJ+QU/M9dNm59SYuKStqvVl5iBT60SWt95K7DwYqFDv59rrs9RtH0Kkqk27g== X-Received: by 2002:a92:d186:0:b0:30d:b66e:e4e3 with SMTP id z6-20020a92d186000000b0030db66ee4e3mr10285677ilz.1.1673638246047; Fri, 13 Jan 2023 11:30:46 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:45 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 04/20] dyndbg: make ddebug_apply_class_bitmap more selective Date: Fri, 13 Jan 2023 12:30:00 -0700 Message-Id: <20230113193016.749791-5-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" ddebug_apply_class_bitmap() currently applies the class settings to all modules, by calling ddebug_exec_queries(query, NULL), where NULL is wildcard ("*" does the same). Make it more selective, by adding query_module param, and passing it into ddebug_exec_queries, instead of the NULL. This allows its more selective use later; for propagating drm.debug settings to dependent modules when/just-after they load. Doing this propagation with "*" is fine, but would match with all previously loaded modules, creating more dynamic_debug.verbose=3 logging activity, and obscuring the actual changes. No functional change. Signed-off-by: Jim Cromie --- after `modprobe i915`, heres the module dependencies, though not all on drm.debug. bash-5.2# lsmod Module Size Used by i915 3133440 0 drm_buddy 20480 1 i915 ttm 90112 1 i915 i2c_algo_bit 16384 1 i915 video 61440 1 i915 wmi 32768 1 video drm_display_helper 200704 1 i915 drm_kms_helper 208896 2 drm_display_helper,i915 drm 606208 5 drm_kms_helper,drm_display_helper,drm_buddy,i915,ttm cec 57344 2 drm_display_helper,i915 --- lib/dynamic_debug.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 823190094350..943e0597ecd4 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -600,7 +600,8 @@ static int ddebug_exec_queries(char *query, const char *modname) /* apply a new bitmap to the sys-knob's current bit-state */ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, - unsigned long *new_bits, unsigned long *old_bits) + unsigned long *new_bits, unsigned long *old_bits, + const char *query_modname) { #define QUERY_SIZE 128 char query[QUERY_SIZE]; @@ -608,7 +609,8 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, int matches = 0; int bi, ct; - v2pr_info("apply: 0x%lx to: 0x%lx\n", *new_bits, *old_bits); + v2pr_info("apply bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, *old_bits, + query_modname ?: ""); for (bi = 0; bi < map->length; bi++) { if (test_bit(bi, new_bits) == test_bit(bi, old_bits)) @@ -617,12 +619,15 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, snprintf(query, QUERY_SIZE, "class %s %c%s", map->class_names[bi], test_bit(bi, new_bits) ? '+' : '-', dcp->flags); - ct = ddebug_exec_queries(query, NULL); + ct = ddebug_exec_queries(query, query_modname); matches += ct; v2pr_info("bit_%d: %d matches on class: %s -> 0x%lx\n", bi, ct, map->class_names[bi], *new_bits); } + v2pr_info("applied bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, *old_bits, + query_modname ?: ""); + return matches; } @@ -678,7 +683,7 @@ static int param_set_dyndbg_classnames(const char *instr, const struct kernel_pa continue; } curr_bits ^= BIT(cls_id); - totct += ddebug_apply_class_bitmap(dcp, &curr_bits, dcp->bits); + totct += ddebug_apply_class_bitmap(dcp, &curr_bits, dcp->bits, NULL); *dcp->bits = curr_bits; v2pr_info("%s: changed bit %d:%s\n", KP_NAME(kp), cls_id, map->class_names[cls_id]); @@ -688,7 +693,7 @@ static int param_set_dyndbg_classnames(const char *instr, const struct kernel_pa old_bits = CLASSMAP_BITMASK(*dcp->lvl); curr_bits = CLASSMAP_BITMASK(cls_id + (wanted ? 1 : 0 )); - totct += ddebug_apply_class_bitmap(dcp, &curr_bits, &old_bits); + totct += ddebug_apply_class_bitmap(dcp, &curr_bits, &old_bits, NULL); *dcp->lvl = (cls_id + (wanted ? 1 : 0)); v2pr_info("%s: changed bit-%d: \"%s\" %lx->%lx\n", KP_NAME(kp), cls_id, map->class_names[cls_id], old_bits, curr_bits); @@ -751,7 +756,7 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) inrep &= CLASSMAP_BITMASK(map->length); } v2pr_info("bits:%lx > %s\n", inrep, KP_NAME(kp)); - totct += ddebug_apply_class_bitmap(dcp, &inrep, dcp->bits); + totct += ddebug_apply_class_bitmap(dcp, &inrep, dcp->bits, NULL); *dcp->bits = inrep; break; case DD_CLASS_TYPE_LEVEL_NUM: @@ -764,7 +769,7 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) old_bits = CLASSMAP_BITMASK(*dcp->lvl); new_bits = CLASSMAP_BITMASK(inrep); v2pr_info("lvl:%ld bits:0x%lx > %s\n", inrep, new_bits, KP_NAME(kp)); - totct += ddebug_apply_class_bitmap(dcp, &new_bits, &old_bits); + totct += ddebug_apply_class_bitmap(dcp, &new_bits, &old_bits, NULL); *dcp->lvl = inrep; break; default: From patchwork Fri Jan 13 19:30:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101528 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CFFB5C3DA78 for ; Fri, 13 Jan 2023 19:31:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A61C910EAC2; Fri, 13 Jan 2023 19:30:53 +0000 (UTC) Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by gabe.freedesktop.org (Postfix) with ESMTPS id CD62C10EABB; Fri, 13 Jan 2023 19:30:47 +0000 (UTC) Received: by mail-io1-xd32.google.com with SMTP id i70so1693989ioa.12; Fri, 13 Jan 2023 11:30:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=b1msYVUUhOCrgXIGS/m89vDjYGfxG+qEJJ3Hk8KO2zg=; b=KMw/tlFPTBHdInpIFLjRMZaiddkQY5a+/CbxIS2oi+kfOmEihj4OKBTcepbxae3ORx jrQPfAGGD/qtlGle2AlTxVymo8j5Tj9egXJJA2wwTGmuaE2cFDBEnLm6O8Q1s8g+wHaP D2YV/njh7TS3O9+teDgB0lSBXX2IxtbwgeQSNIv2c8sbN6nPbCVyYXtBOzbdO+llyPtY QOOXaN0pQcYIJZJVg2eInvxuG7vXckbJHv1b8lTurqmAU4GscrgWjUdbRJ9HfdG5Hn0q O72Yfm0m13FIWlB+IUZb5roJrM6Ns4vPvKsd+WvGOzXOINCfi3jm810dC8a+wNHtMe45 +kag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=b1msYVUUhOCrgXIGS/m89vDjYGfxG+qEJJ3Hk8KO2zg=; b=MuRkWwxt9OAQLefWJO4Yy139bP+NtZQj6Tt6mzqUYzewd9mxKuUtaJW1+JTKE0FMYE rerOugccv1UgP8fhNd+xkGsXrDT1Re+9QVIYs9HEJkNDMt6JYQm6zV3qTw06QTJ2hK+4 j/Ot0jSf6GGqEt59Mma9XGUkZQCZOgsup6DtI9+2z8kKxdzAXQV6ULtnKJhLaTgsNcAS 5eWbikltHH422Fls3gB9jVPEiir3+ivLS8SRRGabN/t3aaFnq2NSuoGlKMlg7oUTkmKq ln0r3jY/2sCAgXtXOAtjzCqN91wRHjNE59lOjyDIDeKe+Rnl76kDqaeA0+mc/VKTP7eM E5Sw== X-Gm-Message-State: AFqh2kppn+SODuMgueV0K/YRksZw8nztZjobK2yfyEgGlsbz8cLY3r48 zxd/708XjmiZG3Fb/3ABQNA= X-Google-Smtp-Source: AMrXdXvd5+gnFoRo7DTIG73NVKzJH6g39k9wx8szV07JN9FrbMq1D3p1ItLxarz/3rS1aOAPhbde8Q== X-Received: by 2002:a05:6602:5ce:b0:704:8629:8400 with SMTP id w14-20020a05660205ce00b0070486298400mr2834590iox.8.1673638247075; Fri, 13 Jan 2023 11:30:47 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:46 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 05/20] dyndbg: split param_set_dyndbg_classes to inner/outer Date: Fri, 13 Jan 2023 12:30:01 -0700 Message-Id: <20230113193016.749791-6-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Split param_set_dyndbg_classes() to interface-preserving wrapper & inner function with an additional param: mod_name, which is passed into ddebug_apply_class_bitmap() to allow adjusting a single module's prdbgs. Wrapper passes NULL, preserving current behavior for now. no functional change. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 36 +++++++++++++++++++++--------------- 1 file changed, 21 insertions(+), 15 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 943e0597ecd4..0a5efc735b36 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -707,18 +707,9 @@ static int param_set_dyndbg_classnames(const char *instr, const struct kernel_pa return 0; } -/** - * param_set_dyndbg_classes - class FOO >control - * @instr: string echo>d to sysfs, input depends on map_type - * @kp: kp->arg has state: bits/lvl, map, map_type - * - * Enable/disable prdbgs by their class, as given in the arguments to - * DECLARE_DYNDBG_CLASSMAP. For LEVEL map-types, enforce relative - * levels by bitpos. - * - * Returns: 0 or <0 if error. - */ -int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) +static int param_set_dyndbg_module_classes(const char *instr, + const struct kernel_param *kp, + const char *modnm) { const struct ddebug_class_param *dcp = kp->arg; const struct ddebug_class_map *map = dcp->map; @@ -755,8 +746,8 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) KP_NAME(kp), inrep, CLASSMAP_BITMASK(map->length)); inrep &= CLASSMAP_BITMASK(map->length); } - v2pr_info("bits:%lx > %s\n", inrep, KP_NAME(kp)); - totct += ddebug_apply_class_bitmap(dcp, &inrep, dcp->bits, NULL); + v2pr_info("bits:0x%lx > %s.%s\n", inrep, modnm ?: "*", KP_NAME(kp)); + totct += ddebug_apply_class_bitmap(dcp, &inrep, dcp->bits, modnm); *dcp->bits = inrep; break; case DD_CLASS_TYPE_LEVEL_NUM: @@ -769,7 +760,7 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) old_bits = CLASSMAP_BITMASK(*dcp->lvl); new_bits = CLASSMAP_BITMASK(inrep); v2pr_info("lvl:%ld bits:0x%lx > %s\n", inrep, new_bits, KP_NAME(kp)); - totct += ddebug_apply_class_bitmap(dcp, &new_bits, &old_bits, NULL); + totct += ddebug_apply_class_bitmap(dcp, &new_bits, &old_bits, modnm); *dcp->lvl = inrep; break; default: @@ -778,6 +769,21 @@ int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) vpr_info("%s: total matches: %d\n", KP_NAME(kp), totct); return 0; } +/** + * param_set_dyndbg_classes - class FOO >control + * @instr: string echo>d to sysfs, input depends on map_type + * @kp: kp->arg has state: bits/lvl, map, map_type + * + * Enable/disable prdbgs by their class, as given in the arguments to + * DECLARE_DYNDBG_CLASSMAP. For LEVEL map-types, enforce relative + * levels by bitpos. + * + * Returns: 0 or <0 if error. + */ +int param_set_dyndbg_classes(const char *instr, const struct kernel_param *kp) +{ + return param_set_dyndbg_module_classes(instr, kp, NULL); +} EXPORT_SYMBOL(param_set_dyndbg_classes); /** From patchwork Fri Jan 13 19:30:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101539 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4B56BC678D7 for ; Fri, 13 Jan 2023 19:31:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 02AF110EAEE; Fri, 13 Jan 2023 19:31:07 +0000 (UTC) Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by gabe.freedesktop.org (Postfix) with ESMTPS id E616510EABB; Fri, 13 Jan 2023 19:30:48 +0000 (UTC) Received: by mail-io1-xd32.google.com with SMTP id y205so6365199iof.0; Fri, 13 Jan 2023 11:30:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WpVmv1h4fPy7xv9D1lk2U93L73H6vXkFF3YkrgZSyFU=; b=gFUquBpFFu+HxDwgXo2T7EYvrJWxXCrd1buhezZ09V2hbi5S1BKEdRMtdlhLOAkV6h CbplhtQMj3XxYm+uO9scNEFGWh2aBYnlDKwjfmx7FSV3CjXdyt5JaYzgnzr4BNRzCu/8 5NdHHcLhPyaJCq2v5glPcalnBcf4QlnLw2MpnwmWdhjCVdneaDRkYuUWA95X6ts+D9PW VqvO5JmqXxi5U+aEfJWiKN1mel1MkAd939pDrEn8+rQnvfiDPXni5X3IBtN1XvL8hDmI FzQpFi6FmrIld0rYG6M09QnDte8qZp4AS3K3aJyNa1hv83c/39gnId7Czd6yKPLDyIvr PSSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=WpVmv1h4fPy7xv9D1lk2U93L73H6vXkFF3YkrgZSyFU=; b=G9kjCxkwDW8cYb4mzWINNWrlRP77AqHZm3zUJYaQXkTarq91bdtneLV7vSwudvUsBA PwG9ddNwexM5BWaQ3Vx+M+WMB4NpZRqlW6bsQzCeSPtdjUWuTGuIZepAfqbRAqsmA4Mv IFd9J/A6fxCVlgRazwkkGrZYQtBLtqImcN6XEZNmPd/7ivR5weGnpVA7dzmH4ZScsGXD Pi+lx0fOrXc6N9ZZhKaZAP8gNaicQNtUjQBclsEtQpX9f7vbBTn12RRk1YkLwWsEGnmS uBtYhIytU7uvXvl/KM8GbobzRO34nIOE2ZIOH1BZ1YPhRahiLO6vgh3t4S3xidLKvBKQ /DrQ== X-Gm-Message-State: AFqh2kqBUIuoakwA0V7GAZHQ+u6Bx7eZ3G5HtOEOsPU9QlIk8J992M1G WpHp2/8HRyHAsgoUqbJoPgk= X-Google-Smtp-Source: AMrXdXvn4tS2uVrgMipElARhcLYnJJmJiUsrVzXuu5YXxTVLwT5HxYgCx4hh/+ZwI64J3mnDtR0ncQ== X-Received: by 2002:a5d:9801:0:b0:6e4:eab7:8c67 with SMTP id a1-20020a5d9801000000b006e4eab78c67mr53011199iol.14.1673638248128; Fri, 13 Jan 2023 11:30:48 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:47 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 06/20] dyndbg: drop NUM_TYPE_ARRAY Date: Fri, 13 Jan 2023 12:30:02 -0700 Message-Id: <20230113193016.749791-7-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" ARRAY_SIZE works here, since array decl is complete. Signed-off-by: Jim Cromie --- include/linux/dynamic_debug.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index bf47bcfad8e6..81b643ab7f6e 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -104,11 +104,9 @@ struct ddebug_class_map { .mod_name = KBUILD_MODNAME, \ .base = _base, \ .map_type = _maptype, \ - .length = NUM_TYPE_ARGS(char*, __VA_ARGS__), \ + .length = ARRAY_SIZE(_var##_classnames), \ .class_names = _var##_classnames, \ } -#define NUM_TYPE_ARGS(eltype, ...) \ - (sizeof((eltype[]){__VA_ARGS__}) / sizeof(eltype)) /* encapsulate linker provided built-in (or module) dyndbg data */ struct _ddebug_info { From patchwork Fri Jan 13 19:30:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101530 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D319DC677F1 for ; Fri, 13 Jan 2023 19:31:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 13A1810EAE3; Fri, 13 Jan 2023 19:31:00 +0000 (UTC) Received: from mail-il1-x135.google.com (mail-il1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) by gabe.freedesktop.org (Postfix) with ESMTPS id 57B9910EAC2; Fri, 13 Jan 2023 19:30:50 +0000 (UTC) Received: by mail-il1-x135.google.com with SMTP id u8so11213931ilq.13; Fri, 13 Jan 2023 11:30:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=lwGmRROjyglOeSoFqRG5imAXV3+5VTAH53vaW+53Odw=; b=A3HDe4nbCJ4aCNqOKtRPCFTfVuiuvhgXH9F+UoYsIB+aY6CSBSbXf0vrAqpewP471x HmjH4546ZKYNNDXXDIawZ0FDak6IdRz/gLYqC4lTzCvai2ZLX1bCOFXF+Jt+Qa7UQ+sc NhAmnTm1Jk3A0Lxj0ch1S+KT9Th9t6kJtXZ0p6V4Kyc4EwyHAHRp08ZPCP7Ze4UqoNY7 0g9RzBzxz6QlQsSiMtc/2le+UF4O1cy7w47fw8zKe4VbIZ6ryF5EfvVz+NThI6ny3v/u BjS7ItVQJ4595l8/qQWVuf2CihOfJmIDHnA802ONMuyjGoZeZlfO2isRMr9LlBJixA6U 5Yqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lwGmRROjyglOeSoFqRG5imAXV3+5VTAH53vaW+53Odw=; b=dp3K6lkMgJcTNeIJWATqpOv4Uzz/Wbfk9pQtM0zJ5450Vv4Lm9mYedVvu+TLZodeEz VFZHw/kzfQeRb2PSAAQIdVQ3XiHFaTyizRfjvOmCCmMrkqAXZEt8f7PaD3vGVH1csF8h xlXPpqLC3TSYtpUKMrr7dcNuNo5uqbTldCKZoHitDPcN1jcQhkrhr6rOVHGPLDOudP8h cA5fJvUsaGKu+ETswIHSaBF/0bl1ehL59mRVwPHgIWukrdeA19vt/22gt+SB/Q8CGIl1 9/er/q1cOUDb9wwIfJ4YXekuzIrqwsI8M3ST0WxK8rbJnZ7D4XUxKUy0HhpB1LGLMFnB 3u/w== X-Gm-Message-State: AFqh2krSZJVTEp5X4rG9qAq3ToCnWyURbpboDdUqhsF2SW8RuqxGj9nI 9Cyzl/uqg+McWJ8qus17+9Y= X-Google-Smtp-Source: AMrXdXsS+qp0ff9HeyA41fJjrhFgXevOlox2A1mtYYscRCcks+mT48KcI/kNjwYKXbQuXDyUlJFs0g== X-Received: by 2002:a05:6e02:1b8e:b0:30d:7451:a58f with SMTP id h14-20020a056e021b8e00b0030d7451a58fmr10482235ili.0.1673638249189; Fri, 13 Jan 2023 11:30:49 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:48 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 07/20] dyndbg: reduce verbose/debug clutter Date: Fri, 13 Jan 2023 12:30:03 -0700 Message-Id: <20230113193016.749791-8-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" currently, for verbose=3, this is logged: dyndbg: query 0: "class DRM_UT_CORE +p" mod:* dyndbg: split into words: "class" "DRM_UT_CORE" "+p" dyndbg: op='+' dyndbg: flags=0x1 dyndbg: *flagsp=0x1 *maskp=0xffffffff dyndbg: parsed: func="" file="" module="" format="" lineno=0-0 class=DRM_UT_CORE dyndbg: no matches for query dyndbg: no-match: func="" file="" module="" format="" lineno=0-0 class=DRM_UT_CORE dyndbg: processed 1 queries, with 0 matches, 0 errs This patch: shrinks 3 lines of 2nd stanza to single line drops 2 middle lines of 3rd stanza 3 differs from 1 only by status 2 is just status, retold in 4, with more info. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 0a5efc735b36..2d4640479e5b 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -265,9 +265,6 @@ static int ddebug_change(const struct ddebug_query *query, } mutex_unlock(&ddebug_lock); - if (!nfound && verbose) - pr_info("no matches for query\n"); - return nfound; } @@ -496,7 +493,6 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers) pr_err("bad flag-op %c, at start of %s\n", *str, str); return -EINVAL; } - v3pr_info("op='%c'\n", op); for (; *str ; ++str) { for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) { @@ -510,7 +506,6 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers) return -EINVAL; } } - v3pr_info("flags=0x%x\n", modifiers->flags); /* calculate final flags, mask based upon op */ switch (op) { @@ -526,7 +521,7 @@ static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers) modifiers->flags = 0; break; } - v3pr_info("*flagsp=0x%x *maskp=0x%x\n", modifiers->flags, modifiers->mask); + v3pr_info("op='%c' flags=0x%x maskp=0x%x\n", op, modifiers->flags, modifiers->mask); return 0; } @@ -536,7 +531,7 @@ static int ddebug_exec_query(char *query_string, const char *modname) struct flag_settings modifiers = {}; struct ddebug_query query = {}; #define MAXWORDS 9 - int nwords, nfound; + int nwords; char *words[MAXWORDS]; nwords = ddebug_tokenize(query_string, words, MAXWORDS); @@ -554,10 +549,7 @@ static int ddebug_exec_query(char *query_string, const char *modname) return -EINVAL; } /* actually go and implement the change */ - nfound = ddebug_change(&query, &modifiers); - vpr_info_dq(&query, nfound ? "applied" : "no-match"); - - return nfound; + return ddebug_change(&query, &modifiers); } /* handle multiple queries in query string, continue on error, return From patchwork Fri Jan 13 19:30:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101533 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 21516C677F1 for ; Fri, 13 Jan 2023 19:31:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 35D0610EAE6; Fri, 13 Jan 2023 19:31:02 +0000 (UTC) Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3CBD410EAC6; Fri, 13 Jan 2023 19:30:51 +0000 (UTC) Received: by mail-io1-xd34.google.com with SMTP id j1so2654437iob.6; Fri, 13 Jan 2023 11:30:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5pKYcyxobqjkxw/cQW3qOcS+2FHDD+NQD5zTk5vyKT0=; b=kv1hHXeGS4Ae++h9FVHklLDkqQoIlKy2J/FnU2oFkPWRn5YRlU8UZcTs1RIDYWwwMO TBL4TmhQtrizT8dE0OVmt0zOTsf+k6Fva2BqdiHvacmnGEvy+iO06Q4Og8mLBeAe5QFl kuxpcjdby0PKyEBCSTTqCYgEPqqQgvUkZyytdXCsUgQIy6zX/aZ5G9Prr7L38uwY1Ijk 20d022OjY5k6l8B8c9ZFZ1KDQzGPvYabn8hhO+JAdSSCH8O7HvIxPwHLDaI4Jb8qJRMg oh/Qq1f07LPCOL9D0gNAF5QNsdyexH02UUdxytsJvwBSGbhUC5rGGWWu+1G1uJGPwAaV NMrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5pKYcyxobqjkxw/cQW3qOcS+2FHDD+NQD5zTk5vyKT0=; b=32nl2e1MASlWr6ft3C3XSrCWlteoZQAFeTAOYm6FX3a7fWRaq+AonK5ozMTCeYo2R2 lw8Rnfa7VpRVG3IZ+woyUJaRj6+/HUQ1xapK85wjkkUM/5sYsDqOXK541HcyntH8IQy+ MT0BaFWlhI2D5cCM3uKtoSuh8eQz0GKz8BJs5UfxJj1VKQQKa+CaBNJpt/s1wV+IE4Yz 9FW0vcRH1En0z0SJmKavOqi20Mbyi3dyb5dUaZiAPnudM19W5tZauOvYEDE7A/1esT+P fLtnAHmOdoPB6FirZaXAq+d6sJ37i5JwG0w9HhK4/aYFzjMPeqc4VS5TIWz7r7GmpvBd mhtA== X-Gm-Message-State: AFqh2koXgH7CydgVmOhz07JcuY61k3R095sXK3LEt+JlNGAoFF02u6Q5 TIso3UoHovOAUCjifS1jxOE= X-Google-Smtp-Source: AMrXdXunTbUvqnk+KDACxZ3sT1a4zW0ivzpLR0SZLpWQKg8LPzuEA6wE5v95Q3wtvppI9IfGoav9Gw== X-Received: by 2002:a05:6602:2083:b0:704:9ab4:ea1c with SMTP id a3-20020a056602208300b007049ab4ea1cmr507697ioa.6.1673638250500; Fri, 13 Jan 2023 11:30:50 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:49 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 08/20] dyndbg: tighten ddebug_class_name() 1st arg Date: Fri, 13 Jan 2023 12:30:04 -0700 Message-Id: <20230113193016.749791-9-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Change function's 1st arg-type, by derefing in the caller. The fn doesnt need any other fields in the old type. no functional change. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 2d4640479e5b..10c29bc19901 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -1110,12 +1110,12 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos) #define class_in_range(class_id, map) \ (class_id >= map->base && class_id < map->base + map->length) -static const char *ddebug_class_name(struct ddebug_iter *iter, struct _ddebug *dp) +static const char *ddebug_class_name(struct ddebug_table *dt, struct _ddebug *dp) { - struct ddebug_class_map *map = iter->table->classes; - int i, nc = iter->table->num_classes; + struct ddebug_class_map *map = dt->classes; + int i; - for (i = 0; i < nc; i++, map++) + for (i = 0; i < dt->num_classes; i++, map++) if (class_in_range(dp->class_id, map)) return map->class_names[dp->class_id - map->base]; @@ -1149,7 +1149,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p) seq_puts(m, "\""); if (dp->class_id != _DPRINTK_CLASS_DFLT) { - class = ddebug_class_name(iter, dp); + class = ddebug_class_name(iter->table, dp); if (class) seq_printf(m, " class:%s", class); else From patchwork Fri Jan 13 19:30:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101538 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7D7D6C54EBD for ; Fri, 13 Jan 2023 19:31:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0882710EAF9; Fri, 13 Jan 2023 19:31:06 +0000 (UTC) Received: from mail-il1-x132.google.com (mail-il1-x132.google.com [IPv6:2607:f8b0:4864:20::132]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4AE1010EAC2; Fri, 13 Jan 2023 19:30:52 +0000 (UTC) Received: by mail-il1-x132.google.com with SMTP id o13so11219955ilc.7; Fri, 13 Jan 2023 11:30:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+F9kl44jma+M7h1pP8h2A8ZnugnYlmyHf4a+VRYvO4M=; b=nFsCAxBqzc8DAkq7Y0KR8/rtL94U2RDxMfUQBOss23pmYoJOp7id0p4gkP3JNRidrJ t9i08P+3SiU8MspP5AFQVH3ZNwImZO+f4rGsZBF6YGkyhk9IlaXq6aE7D4aTOdoOmpz8 aAO+uzg+XjIcaGOLdEBy7s3XAI24dXhJb0FC/T3jr2K7Xa4EhCPhXsSwC4MzFSL3LLBT olAbPIIL2DzDALUCW5asOYZP0JE7apBNs+hciXcYwtxkpgl3oJa2kjSm5FHnWp9IZoS1 OZGqDReT1Wh/D56NQ8dbol0ZsMm6XTl1nRNRGFpMc0YLoyxKs3kMttcI5CYcPP6U7VwV c9Fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+F9kl44jma+M7h1pP8h2A8ZnugnYlmyHf4a+VRYvO4M=; b=uVNHzuOxUNCEKSjU2fXfvNSFZ+eEMqdT6d2F367ISSME3qlbzYdTvZvCGS0uI62ywJ TFgT2zJfKXNmcry4q/ni794YWjzlwmpeCREEpSe5oMQinlPuRWQAyj/4L9WQpNFE28Bw iuXHvMc4TNn71OhRmpp8CUuYJb2h2+G0QgYbzYhGziAJtRN6PvRoEIOq8O6uuJzSpzHe ZDIxeQlm+Y9FUt4HCPcaHbDT6gG82tByurDUiWYhTZvEF8Xv80e9C2cKOIT6lX7O5UWd XhApyxX579xJp2IMtWOinfbNn+cxD7G3KJaCn6wXH+6BTxpP0FGV2ZRtLFjZa/1pT/Xc 73/g== X-Gm-Message-State: AFqh2koKvJbXlBHXig5L1eeccWeoTw8We2IUG/L1nzBwVsW2hUa8D0OY t5tpUTYJQAdw+1L6wLxO7hQ= X-Google-Smtp-Source: AMrXdXsdczYM5PwWfO4hwAbHHjf0U0cvqxRknpww2NlHevVo41RRx9YbsfFXEX5Txlr07b+gR8gCVQ== X-Received: by 2002:a92:ac06:0:b0:30c:2ed2:f8c4 with SMTP id r6-20020a92ac06000000b0030c2ed2f8c4mr32991854ilh.2.1673638251495; Fri, 13 Jan 2023 11:30:51 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:51 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 09/20] dyndbg: constify ddebug_apply_class_bitmap args Date: Fri, 13 Jan 2023 12:30:05 -0700 Message-Id: <20230113193016.749791-10-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" ddebug_apply_class_bitmap() does not alter its 2 bitmap args, make this guarantee in the interface. NOTE: the bitmap is also available in the dcp arg, but the 2 vars serve a 2nd purpose; the CLASS_TYPE callers use them to translate levels into their underlying disjoint representation. Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 10c29bc19901..b51f4bde6198 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -592,7 +592,7 @@ static int ddebug_exec_queries(char *query, const char *modname) /* apply a new bitmap to the sys-knob's current bit-state */ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, - unsigned long *new_bits, unsigned long *old_bits, + const unsigned long *new_bits, const unsigned long *old_bits, const char *query_modname) { #define QUERY_SIZE 128 From patchwork Fri Jan 13 19:30:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101536 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A80A2C54EBD for ; Fri, 13 Jan 2023 19:31:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8FB2710EAC3; Fri, 13 Jan 2023 19:31:04 +0000 (UTC) Received: from mail-il1-x12c.google.com (mail-il1-x12c.google.com [IPv6:2607:f8b0:4864:20::12c]) by gabe.freedesktop.org (Postfix) with ESMTPS id B886210EACE; Fri, 13 Jan 2023 19:30:53 +0000 (UTC) Received: by mail-il1-x12c.google.com with SMTP id g2so11237166ila.4; Fri, 13 Jan 2023 11:30:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=o7Sl1+m4M1j8WJgjkZsfCE83lfCieUADdLatlJyRZk4=; b=UUxPReOyE5t2HK4g3+OiK0lJfS7/W5SiXi/8dvJndexPbWrHrdVdIo6sQjwZlnO4lj d59I4bJA9ZwCaFkDJAxDuPtwYhnPd2+m2ZzYHyKvVSu2qesPO9ALPgC8VloEAGLPx8fr nvQxe7ZKAyOjOzmtWq2kBmHryqo9YGZuZlOtkKMjTx4ZdqgYndz6jLJHNILIVIy9gUIf 38sLBdjg1nQ4iB0Z3nIJaIY0HqawzML21AvTtPCXuUpCVhwAwB2grcVFsoc6/yaOczT4 zdCw+bZttVV46laSVa8WlT6TshEVma9255f5uHQrpeAfe2wB2QuqcnG1L3sZ6bVg+B4U ldPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=o7Sl1+m4M1j8WJgjkZsfCE83lfCieUADdLatlJyRZk4=; b=ynVU3CiBlWxq+ovfC67LV8Z4ewTeTBFfSk2vWrnzu37UbnBHyUTbBYz0jWJgoILiZ6 PnYIUIDXWgHG8hFFUwGdrX45awssgOZ6vQ1+Y6WXDTunuvOTwI8MH/BM4MUYmFQIbxnq bR1QQHktmEtFk3f1gcqYMWGiiiBVEUoMcvZdJyuumWiHDv01u6k9ukk2ULNKEGDcJROz i7t0Mw60HtEEPOpvA6Gks8XUElMv+J0hInjYKp/7GO21vAnN/SJMWFQeJGbaoyg8bA/R kVQnWGcy//lYKteJbDZNLtX827YNXRfajO5H9kDqnkcj+FZp/9ulNn58azjxM+jkXNZq hOsw== X-Gm-Message-State: AFqh2koaPzwLHce5lVkwx+S6UE2RcYgXNEwq9NB6GBOBwvI8g4IjsjfN 2UDy/h0N0VHRyXLC1+fWL6s= X-Google-Smtp-Source: AMrXdXs2Th/FC8QIUvum624SW69rbU6V6fiQLmXzAJwJ9NWflwnDm4Bse4NZu0eswCOCjqmrJHAT9w== X-Received: by 2002:a92:cb4a:0:b0:30e:e000:ad3d with SMTP id f10-20020a92cb4a000000b0030ee000ad3dmr2159127ilq.4.1673638252662; Fri, 13 Jan 2023 11:30:52 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:52 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 10/20] dyndbg-API: split DECLARE_(DYNDBG_CLASSMAP) to $1(_DEFINE|_USE) Date: Fri, 13 Jan 2023 12:30:06 -0700 Message-Id: <20230113193016.749791-11-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" DECLARE_DYNDBG_CLASSMAP's job was to allow modules to declare the debug classes/categories they want dyndbg to >control on their behalf. Its args give the class-names, their mapping to class_ids, and the sysfs interface style (usually a class-bitmap). Modules wanting a drm.debug style knob need to create the kparam, and call module_param_cb() to wire the sysfs node to the classmap. DRM does this is in drm_print.c In DRM, multiple modules declare identical DRM_UT_* classmaps, so that the class'd prdbgs are modified across those modules in a coordinated way across the subsystem, by either explicit class DRM_UT_* queries to >control, or by writes to /sys/module/drm/parameters/debug (drm.debug) This coordination-by-identical-declarations is weird, so this patch splits the macro into _DEFINE and _USE flavors. This distinction follows the definition vs declaration that K&R gave us, improving the api; _DEFINE is used once to specify the classmap, and multiple users _USE the single definition explicitly. Currently the latter just reuses the former, and still needs all the same args, but that can be tuned later; the _DEFINE can initialize an (extern/global) struct classmap, and _USE can, well use/reference that struct. Also wrap DYNDBG_CLASSMAP_USEs with ifdef DRM_USE_DYNAMIC_DEBUG to balance with the one around drm_print's use of DYNDBG_CLASSMAP_DEFINE. Signed-off-by: Jim Cromie --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +++- drivers/gpu/drm/display/drm_dp_helper.c | 4 +++- drivers/gpu/drm/drm_crtc_helper.c | 4 +++- drivers/gpu/drm/drm_print.c | 2 +- drivers/gpu/drm/i915/i915_params.c | 4 +++- drivers/gpu/drm/nouveau/nouveau_drm.c | 4 +++- include/linux/dynamic_debug.h | 20 ++++++++++++---- lib/test_dynamic_debug.c | 32 ++++++++++++------------- 8 files changed, 48 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index bf2d50c8c92a..0075184b5d93 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -188,7 +188,8 @@ int amdgpu_vcnfw_log; static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work); -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", @@ -199,6 +200,7 @@ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_LEASE", "DRM_UT_DP", "DRM_UT_DRMRES"); +#endif struct amdgpu_mgpu_info mgpu_info = { .mutex = __MUTEX_INITIALIZER(mgpu_info.mutex), diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 16565a0a5da6..8fa7a88299e7 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -41,7 +41,8 @@ #include "drm_dp_helper_internal.h" -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", @@ -52,6 +53,7 @@ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_LEASE", "DRM_UT_DP", "DRM_UT_DRMRES"); +#endif struct dp_aux_backlight { struct backlight_device *base; diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 7d86020b5244..2f747c9c8f60 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -51,7 +51,8 @@ #include "drm_crtc_helper_internal.h" -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", @@ -62,6 +63,7 @@ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_LEASE", "DRM_UT_DP", "DRM_UT_DRMRES"); +#endif /** * DOC: overview diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index 5b93c11895bb..4b697e18238d 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -56,7 +56,7 @@ MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug cat module_param_named(debug, __drm_debug, ulong, 0600); #else /* classnames must match vals of enum drm_debug_category */ -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +DYNDBG_CLASSMAP_DEFINE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index d1e4d528cb17..b5b2542ae364 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -29,7 +29,8 @@ #include "i915_params.h" #include "i915_drv.h" -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", @@ -40,6 +41,7 @@ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_LEASE", "DRM_UT_DP", "DRM_UT_DRMRES"); +#endif #define i915_param_named(name, T, perm, desc) \ module_param_named(name, i915_modparams.name, T, perm); \ diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index fd99ec0f4257..2963cf5b0807 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -71,7 +71,8 @@ #include "nouveau_svm.h" #include "nouveau_dmem.h" -DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_CORE", "DRM_UT_DRIVER", "DRM_UT_KMS", @@ -82,6 +83,7 @@ DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, "DRM_UT_LEASE", "DRM_UT_DP", "DRM_UT_DRMRES"); +#endif MODULE_PARM_DESC(config, "option string to pass to driver core"); static char *nouveau_config; diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 81b643ab7f6e..1cdfd62fd2e4 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -56,7 +56,7 @@ struct _ddebug { #endif } __attribute__((aligned(8))); -enum class_map_type { +enum ddebug_class_map_type { DD_CLASS_TYPE_DISJOINT_BITS, /** * DD_CLASS_TYPE_DISJOINT_BITS: classes are independent, one per bit. @@ -86,17 +86,19 @@ struct ddebug_class_map { const char **class_names; const int length; const int base; /* index of 1st .class_id, allows split/shared space */ - enum class_map_type map_type; + enum ddebug_class_map_type map_type; }; /** - * DECLARE_DYNDBG_CLASSMAP - declare classnames known by a module + * DYNDBG_CLASSMAP_DEFINE - define the class_map that names the + * debug classes used in this module. This tells dyndbg the authorized + * classnames it should manipulate. * @_var: a struct ddebug_class_map, passed to module_param_cb * @_type: enum class_map_type, chooses bits/verbose, numeric/symbolic * @_base: offset of 1st class-name. splits .class_id space * @classes: class-names used to control class'd prdbgs */ -#define DECLARE_DYNDBG_CLASSMAP(_var, _maptype, _base, ...) \ +#define DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, ...) \ static const char *_var##_classnames[] = { __VA_ARGS__ }; \ static struct ddebug_class_map __aligned(8) __used \ __section("__dyndbg_classes") _var = { \ @@ -108,6 +110,16 @@ struct ddebug_class_map { .class_names = _var##_classnames, \ } +/* + * refer to the classmap instantiated once, by the macro above. This + * distinguishes the multiple users of drm.debug from the single + * definition, allowing them to specialize. ATM its a pass-thru, but + * it should help regularize the admittedly wierd sharing by identical + * definitions. + */ +#define DYNDBG_CLASSMAP_USE(_var, _maptype, _base, ...) \ + DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, __VA_ARGS__) + /* encapsulate linker provided built-in (or module) dyndbg data */ struct _ddebug_info { struct _ddebug *descs; diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 89dd7f285e31..8d384b979e74 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -62,38 +62,38 @@ enum cat_disjoint_bits { D2_LEASE, D2_DP, D2_DRMRES }; -DECLARE_DYNDBG_CLASSMAP(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "D2_CORE", - "D2_DRIVER", - "D2_KMS", - "D2_PRIME", - "D2_ATOMIC", - "D2_VBL", - "D2_STATE", - "D2_LEASE", - "D2_DP", - "D2_DRMRES"); +DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, 0, + "D2_CORE", + "D2_DRIVER", + "D2_KMS", + "D2_PRIME", + "D2_ATOMIC", + "D2_VBL", + "D2_STATE", + "D2_LEASE", + "D2_DP", + "D2_DRMRES"); DD_SYS_WRAP(disjoint_bits, p); DD_SYS_WRAP(disjoint_bits, T); /* symbolic input, independent bits */ enum cat_disjoint_names { LOW = 10, MID, HI }; -DECLARE_DYNDBG_CLASSMAP(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, - "LOW", "MID", "HI"); +DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, + "LOW", "MID", "HI"); DD_SYS_WRAP(disjoint_names, p); DD_SYS_WRAP(disjoint_names, T); /* numeric verbosity, V2 > V1 related */ enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 }; -DECLARE_DYNDBG_CLASSMAP(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, +DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, "V0", "V1", "V2", "V3", "V4", "V5", "V6", "V7"); DD_SYS_WRAP(level_num, p); DD_SYS_WRAP(level_num, T); /* symbolic verbosity */ enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 }; -DECLARE_DYNDBG_CLASSMAP(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, 22, - "L0", "L1", "L2", "L3", "L4", "L5", "L6", "L7"); +DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, 22, + "L0", "L1", "L2", "L3", "L4", "L5", "L6", "L7"); DD_SYS_WRAP(level_names, p); DD_SYS_WRAP(level_names, T); From patchwork Fri Jan 13 19:30:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101531 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B7ACC678D4 for ; Fri, 13 Jan 2023 19:31:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6ED5F10EAEB; Fri, 13 Jan 2023 19:31:02 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5F5A310EAD3; Fri, 13 Jan 2023 19:30:54 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id h26so11225061ila.11; Fri, 13 Jan 2023 11:30:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ww+3SueiUHoCitYrSDWO8ffFpPcz7FnsT8mBQaBvWbA=; b=jh8UX2Q211H4EUbNFb9Y/zMlOBh94pDye0mJCLGSYNsPbeTvPMD42ag8DOgpKdeaX2 jNiQvvD0eAwYju556HZHviFlFSqhqo03nyxFA8RXfOxri8B4f5SPTc+c68/iVwR7Slg7 4z7wORaiWjTX/cv8A2NS2Li9M7R5iAKJWngmJWXlGrNIiGXO6wy4fHPAxvCCpf11rbvD +hwYzuixYvAwQ4ZumrqCwCMkf4gkPFG3e6MN0Ctr2lbae6aect7EQk4mNKcDha/8NLaB nANNpjkq4MGQ60vV7TBNxC5Tu9YGNmnEXrvZ1q7ToaV8COmK6Nx8wDgeJA5Rbr805Sur LJlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ww+3SueiUHoCitYrSDWO8ffFpPcz7FnsT8mBQaBvWbA=; b=afqWm+5vqaShM06osT2bQuTgL6CPK1v88KjkeAX/3oSdXKN62AcdpmOlB+QNevgimq fSfy1OGESvwa15/0x58FRr3PkU1FsbfdeigFfBwrSZB0plpFXqPsfvYh7PmiSLppstA2 byFBtsGbGImIAMOKwBMgZzy+mWa5tY/Mg3QJ7aqzWrMy1sLm7hqtE7GxO9xsD+CCzVhS vAu0PdD5bGy1aOA+dgxYpWjFiv1HGxwdqv78P1ncthhbBFnC3vGH/dVEJW2lwHartKPw Mo6qZxs32DrL1B/qwkdbLvdWHv7ZbDF7jiS0XDpCfSE32YV/iAW5DYoPdIquwBnnSeek 0tDg== X-Gm-Message-State: AFqh2koH0wstZBG+5cqGXNS/FZ1BlVWdhMsO8WQAQvIlwFtg23stZ/aC Fr3SCTdPSSpT8WvSpCROwQ8= X-Google-Smtp-Source: AMrXdXuPuviDGlo0ZTneXXHi5n4jyPbQPD+3oh8IUEST16U72gkfwe35/NGuBn1LdnoIPYsme1yDlg== X-Received: by 2002:a92:b703:0:b0:305:e3da:fae8 with SMTP id k3-20020a92b703000000b00305e3dafae8mr57500774ili.10.1673638253870; Fri, 13 Jan 2023 11:30:53 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:53 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 11/20] dyndbg-API: specialize DYNDBG_CLASSMAP_(DEFINE|USE) Date: Fri, 13 Jan 2023 12:30:07 -0700 Message-Id: <20230113193016.749791-12-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Now that the DECLARE_DYNDBG_CLASSMAP macro has been split into DYNDBG_CLASSMAP_DEFINE and DYNDBG_CLASSMAP_USE, lets differentiate them according to their separate jobs. Dyndbg's existing __dyndbg_classes[] section does: . catalogs the classmaps defined by the module (or builtin modules) . authorizes dyndbg to >control those class'd prdbgs for the module. This patch adds __dyndbg_class_refs[] section: . catalogs references/uses of the above classmap definitions. . authorizes dyndbg to >control those class'd prdbgs in ref'g module. . maps the client module to classmap definitions drm-drivers and helpers are clients. this allows dyndbg to apply drm.debug to the client module, when added. The distinction of the 2 roles yields 2 gains: It follows the define-once-declare-elsewhere pattern that K&R gave us, dumping the weird coordinated-changes-by-identical-classmaps API. It should help solve the chicken-egg problem that DRM_USE_DYNAMIC_DEBUG has; the _USEr module must propagate the drm.debug setting once the using module has loaded. The new DYNDBG_CLASSMAP_* macros add records to the sections: DYNDBG_CLASSMAP_DEFINE: invoked just once per sub-system. for drm, its drm_print, where drm.debug is exposed. defines the classmap, names "DRM_UT_*", maps to class_id's authorizes dyndbg to exert >control populates __dyndbg_classes[] "section", __used. exports the classmap. DYNDBG_CLASSMAP_USE: invoked by modules using classmaps defined & exported elsewhere populates __dyndbg_class_refs[] "section", __used. maps client-module name to the extern'd classmap. has client-name, so dyndbg can recognize loading client modules. also: struct ddebug_info gets 2 new fields to encapsulate the new section: class_refs, num_class_refs. set by dynamic_debug_init() for builtins. or by kernel/module/main:load_info() for loadable modules. . struct ddebug_class_user contains: user-module-name, ref to classmap-defn dyndbg finds drm-driver's use of a classmap, gets/applies its settings . vmlinux.lds.h additions: linker symbols, KEEP for new section dynamic_debug.c: 2 sets of changes; those "under" ddebug_add_module(), immediately below those "under" ddebug_change(), further below ddebug_attach_module_classes(): as before: called from ddebug_add_module finds classmaps whose .mod_name matches module being added. attaches them to the module's ddebug_table. ddebug_attach_client_module_classes(): new: called from ddebug_add_module, after list-add to ddebug-tables. like above, but works class-refs, not classes. foreach __dyndbg_class_refs: ddebug_param_load_dependent_class(classmap*) s/ddebug_find_kparams/ddebug_apply_parents_params/. ddebug_find_kparam(classmap*): scans module's/builtin kernel-params, calls ddebug_match_attach_kparam for each to find the params/sysfs-nodes using a classmap. ddebug_match_apply_kparam(): 1st, it tests the kernel-param.ops is dyndbg's; this guarantees that the attached arg is a struct ddebug_class_param, which has a ref to the param's state. Then compare the modname being loaded to the classmap.mod_name; if it matches, save the debug_class_param into the classmap.dc_parm. This lets users of the classmap (in particular a client) access the state. ddebug_param_load_dependent_class(): Called from ddebug_attach_client_module_classes() on each class_refs[] entry. Each user refs a classmap which has already been seen by ddebug_find_kparam(), and whose .dc_parm has the state. So this fn just copies the state to a local var, then calls ddebug_apply_class_bitmap() to apply it to the dependent module. ddebug_apply_class_bitmap() tests for bit changes before sending messages without making changes. ddebug_find_valid_class(): This helps ddebug_change(), doing the search over classmaps, looking for the class given to >control. So now it searches over __dyndbg_class_refs[] after __dyndbg_classes[]. Thats the theory anyway. things are still broken (differently) for both builtins and loadables. For loadables, the >control is applied, but doesnt alter any callsites. For builtins, things break earlier. [*] consider swapping struct ddebug_class_param's dc_parm for kparam. This gives access to kparam->name, helpful for current debugging. Attaching that kp via macro would simplify attach-*module-classes too. Signed-off-by: Jim Cromie Signed-off-by: Jim Cromie dyndbg: rework ddebug_(|client_)_module_attach_classes move ddebug_attach_module_classes() up. name-refinements++: s/ddebug_param_load_dependent_class/ddebug_apply_parents_params/ Signed-off-by: Jim Cromie --- include/asm-generic/vmlinux.lds.h | 3 + include/linux/dynamic_debug.h | 39 ++++--- kernel/module/main.c | 2 + lib/dynamic_debug.c | 166 ++++++++++++++++++++++++++---- 4 files changed, 176 insertions(+), 34 deletions(-) diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 3dc5824141cd..7100701fb68c 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -363,6 +363,9 @@ __start___dyndbg_classes = .; \ KEEP(*(__dyndbg_classes)) \ __stop___dyndbg_classes = .; \ + __start___dyndbg_class_refs = .; \ + KEEP(*(__dyndbg_class_refs)) \ + __stop___dyndbg_class_refs = .; \ __start___dyndbg = .; \ KEEP(*(__dyndbg)) \ __stop___dyndbg = .; \ diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 1cdfd62fd2e4..397ac8294230 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -81,8 +81,8 @@ enum ddebug_class_map_type { }; struct ddebug_class_map { - struct module *mod; - const char *mod_name; /* needed for builtins */ + const struct module *mod; /* NULL for builtins */ + const char *mod_name; const char **class_names; const int length; const int base; /* index of 1st .class_id, allows split/shared space */ @@ -99,8 +99,8 @@ struct ddebug_class_map { * @classes: class-names used to control class'd prdbgs */ #define DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, ...) \ - static const char *_var##_classnames[] = { __VA_ARGS__ }; \ - static struct ddebug_class_map __aligned(8) __used \ + const char *_var##_classnames[] = { __VA_ARGS__ }; \ + struct ddebug_class_map __aligned(8) __used \ __section("__dyndbg_classes") _var = { \ .mod = THIS_MODULE, \ .mod_name = KBUILD_MODNAME, \ @@ -108,24 +108,37 @@ struct ddebug_class_map { .map_type = _maptype, \ .length = ARRAY_SIZE(_var##_classnames), \ .class_names = _var##_classnames, \ - } + }; \ + EXPORT_SYMBOL(_var) -/* - * refer to the classmap instantiated once, by the macro above. This - * distinguishes the multiple users of drm.debug from the single - * definition, allowing them to specialize. ATM its a pass-thru, but - * it should help regularize the admittedly wierd sharing by identical - * definitions. +struct ddebug_class_user { + char *user_mod_name; + struct ddebug_class_map *map; +}; +/** + * DYNDBG_CLASSMAP_USE - Use a classmap DEFINEd in another module. + * This lets dyndbg initialize the dependent module's prdbgs from the + * other module's controlling sysfs node. */ -#define DYNDBG_CLASSMAP_USE(_var, _maptype, _base, ...) \ - DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, __VA_ARGS__) +#define DYNDBG_CLASSMAP_USE(_var, ...) \ + DYNDBG_CLASSMAP_USE_(_var, __UNIQUE_ID(ddebug_class_user), \ + __VA_ARGS__) +#define DYNDBG_CLASSMAP_USE_(_var, _uname, ...) \ + extern struct ddebug_class_map _var; \ + static struct ddebug_class_user __used \ + __section("__dyndbg_class_refs") _uname = { \ + .user_mod_name = KBUILD_MODNAME, \ + .map = &_var, \ + } /* encapsulate linker provided built-in (or module) dyndbg data */ struct _ddebug_info { struct _ddebug *descs; struct ddebug_class_map *classes; + struct ddebug_class_user *class_refs; unsigned int num_descs; unsigned int num_classes; + unsigned int num_class_refs; }; struct ddebug_class_param { diff --git a/kernel/module/main.c b/kernel/module/main.c index d02d39c7174e..ee4f85a3b8f0 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -2111,6 +2111,8 @@ static int find_module_sections(struct module *mod, struct load_info *info) sizeof(*info->dyndbg.descs), &info->dyndbg.num_descs); info->dyndbg.classes = section_objs(info, "__dyndbg_classes", sizeof(*info->dyndbg.classes), &info->dyndbg.num_classes); + info->dyndbg.class_refs = section_objs(info, "__dyndbg_class_refs", + sizeof(*info->dyndbg.class_refs), &info->dyndbg.num_class_refs); return 0; } diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index b51f4bde6198..19bf66229d45 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -43,13 +43,16 @@ extern struct _ddebug __start___dyndbg[]; extern struct _ddebug __stop___dyndbg[]; extern struct ddebug_class_map __start___dyndbg_classes[]; extern struct ddebug_class_map __stop___dyndbg_classes[]; +extern struct ddebug_class_user __start___dyndbg_class_refs[]; +extern struct ddebug_class_user __stop___dyndbg_class_refs[]; struct ddebug_table { struct list_head link; const char *mod_name; struct _ddebug *ddebugs; struct ddebug_class_map *classes; - unsigned int num_ddebugs, num_classes; + struct ddebug_class_user *class_refs; + unsigned int num_ddebugs, num_classes, num_class_refs; }; struct ddebug_query { @@ -147,21 +150,36 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg) query->first_lineno, query->last_lineno, query->class_string); } +#define vpr_dt_info(dt, _msg, ...) \ + v2pr_info(_msg " module:%s nd:%d nc:%d nu:%d\n", ##__VA_ARGS__, \ + dt->mod_name, dt->num_ddebugs, dt->num_classes, dt->num_class_refs); + #define __outvar /* filled by callee */ static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table const *dt, const char *class_string, __outvar int *class_id) { struct ddebug_class_map *map; + struct ddebug_class_user *cli; int i, idx; - for (map = dt->classes, i = 0; i < dt->num_classes; i++, map++) { + for (i = 0, map = dt->classes; i < dt->num_classes; i++, map++) { idx = match_string(map->class_names, map->length, class_string); if (idx >= 0) { *class_id = idx + map->base; + vpr_dt_info(dt, "good-class: %s.%s ", map->mod_name, class_string); return map; } } + for (i = 0, cli = dt->class_refs; i < dt->num_class_refs; i++, cli++) { + idx = match_string(cli->map->class_names, cli->map->length, class_string); + if (idx >= 0) { + *class_id = idx + cli->map->base; + vpr_dt_info(dt, "class-ref: %s.%s ", + cli->user_mod_name, class_string); + return cli->map; + } + } *class_id = -ENOENT; return NULL; } @@ -590,9 +608,10 @@ static int ddebug_exec_queries(char *query, const char *modname) return nfound; } -/* apply a new bitmap to the sys-knob's current bit-state */ +/* apply a new class-param setting */ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, - const unsigned long *new_bits, const unsigned long *old_bits, + const unsigned long *new_bits, + const unsigned long *old_bits, const char *query_modname) { #define QUERY_SIZE 128 @@ -601,8 +620,9 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, int matches = 0; int bi, ct; - v2pr_info("apply bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, *old_bits, - query_modname ?: ""); + if (*new_bits != *old_bits) + v2pr_info("apply bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, + *old_bits, query_modname ?: "'*'"); for (bi = 0; bi < map->length; bi++) { if (test_bit(bi, new_bits) == test_bit(bi, old_bits)) @@ -617,8 +637,9 @@ static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp, v2pr_info("bit_%d: %d matches on class: %s -> 0x%lx\n", bi, ct, map->class_names[bi], *new_bits); } - v2pr_info("applied bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, *old_bits, - query_modname ?: ""); + if (*new_bits != *old_bits) + v2pr_info("applied bitmap: 0x%lx to: 0x%lx for %s\n", *new_bits, + *old_bits, query_modname ?: "'*'"); return matches; } @@ -720,7 +741,10 @@ static int param_set_dyndbg_module_classes(const char *instr, /* numeric input, accept and fall-thru */ rc = kstrtoul(instr, 0, &inrep); if (rc) { - pr_err("expecting numeric input: %s > %s\n", instr, KP_NAME(kp)); + char *nl = strchr(instr, '\n'); + if (nl) + *nl = '\0'; + pr_err("expecting numeric input, not: %s > %s\n", instr, KP_NAME(kp)); return -EINVAL; } break; @@ -1113,12 +1137,17 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos) static const char *ddebug_class_name(struct ddebug_table *dt, struct _ddebug *dp) { struct ddebug_class_map *map = dt->classes; + struct ddebug_class_user *cli = dt->class_refs; int i; for (i = 0; i < dt->num_classes; i++, map++) if (class_in_range(dp->class_id, map)) return map->class_names[dp->class_id - map->base]; + for (i = 0; i < dt->num_class_refs; i++, cli++) + if (class_in_range(dp->class_id, cli->map)) + return cli->map->class_names[dp->class_id - cli->map->base]; + return NULL; } @@ -1199,31 +1228,120 @@ static const struct proc_ops proc_fops = { .proc_write = ddebug_proc_write }; + +/* + * Find this module's classmaps in a sub/whole-range of the builtin/ + * modular classmap vector/section. Save the start and length of the + * subrange at its edges. + */ static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug_info *di) { struct ddebug_class_map *cm; int i, nc = 0; - /* - * Find this module's classmaps in a subrange/wholerange of - * the builtin/modular classmap vector/section. Save the start - * and length of the subrange at its edges. - */ - for (cm = di->classes, i = 0; i < di->num_classes; i++, cm++) { + for (i = 0, cm = di->classes; i < di->num_classes; i++, cm++) { if (!strcmp(cm->mod_name, dt->mod_name)) { if (!nc) { - v2pr_info("start subrange, class[%d]: module:%s base:%d len:%d ty:%d\n", - i, cm->mod_name, cm->base, cm->length, cm->map_type); dt->classes = cm; + v2pr_info("classes[0..]: module:%s base:%d len:%d ty:%d\n", + cm->mod_name, cm->base, cm->length, cm->map_type); } nc++; } } - if (nc) { - dt->num_classes = nc; + dt->num_classes = nc; + if (nc) vpr_info("module:%s attached %d classes\n", dt->mod_name, nc); +} + +#define vpr_cm_info(cm, _msg, ...) \ + v2pr_info(_msg "module:%s base:%d len:%d type:%d\n", ##__VA_ARGS__, \ + cm->mod_name, cm->base, cm->length, cm->map_type) + +static void ddebug_match_apply_kparam(const struct kernel_param *kp, + const struct ddebug_class_map *cm, + const char *cli_name) +{ + struct ddebug_class_param *dcp; + unsigned long new_bits, old_bits = 0; + int totct = 0; + + if (kp->ops != ¶m_ops_dyndbg_classes) + return; + + dcp = (struct ddebug_class_param *)kp->arg; + + if (cm == dcp->map) { + v2pr_info("found kp:%s =0x%lx", kp->name, *dcp->bits); + vpr_cm_info(cm, "mapped to:"); + /* + * using apply-bitmap is too low. + * param_set_dyndbg_classes uses map_type to sort + * levels-to-bits. + * param_set_dyndbg_classes is too high, it takes + * string inputs. + * de-union-ing levels/bits might solve it (partly), + * at least simplifying the translation, and possibly + * the apply-bitmap fn/iface + */ + new_bits = *dcp->bits; + totct += ddebug_apply_class_bitmap(dcp, &new_bits, &old_bits, cli_name); + } +} + +static void ddebug_apply_parents_params(const struct ddebug_class_map *cm, + const char *user_modname) +{ + const struct kernel_param *kp; +#if IS_ENABLED(CONFIG_MODULES) + int i; + + if (cm->mod) { + vpr_cm_info(cm, "loaded class:"); + for (i = 0, kp = cm->mod->kp; i < cm->mod->num_kp; i++, kp++) + ddebug_match_apply_kparam(kp, cm, user_modname); + } +#endif + if (!cm->mod) { + vpr_cm_info(cm, "builtin class:"); + for (kp = __start___param; kp < __stop___param; kp++) + ddebug_match_apply_kparam(kp, cm, user_modname); + } +} + +/* + * propagates class-params thru their classmaps to class-users. this + * means a query against the dt/module, which means it must be on the + * list to be seen by ddebug_change. + */ +static void ddebug_attach_client_module_classes(struct ddebug_table *dt, const struct _ddebug_info *di) +{ + struct ddebug_class_user *cli; + const struct ddebug_class_map *cm; + int i, nc = 0; + + for (i = 0, cli = di->class_refs; i < di->num_class_refs; i++, cli++) { + + BUG_ON(!cli || !cli->map || !cli->user_mod_name); + + if (!strcmp(cli->user_mod_name, dt->mod_name)) { + + v2pr_info("class_ref[%d] %s -> %s\n", i, + cli->user_mod_name, cli->map->mod_name); + + if (!nc++) + dt->class_refs = cli; + } + } + dt->num_class_refs = nc; + + for (i = 0, cli = dt->class_refs; i < dt->num_class_refs; i++, cli++) { + cm = cli->map; + ddebug_apply_parents_params(cm, cli->user_mod_name); } + + vpr_dt_info(dt, "attach-client-module: "); } /* @@ -1235,7 +1353,8 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, { struct ddebug_table *dt; - v3pr_info("add-module: %s.%d sites\n", modname, di->num_descs); + v3pr_info("add-module: %s %d sites %d.%d\n", modname, di->num_descs, + di->num_classes, di->num_class_refs); if (!di->num_descs) { v3pr_info(" skip %s\n", modname); return 0; @@ -1258,13 +1377,16 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, INIT_LIST_HEAD(&dt->link); - if (di->classes && di->num_classes) + if (di->num_classes) ddebug_attach_module_classes(dt, di); mutex_lock(&ddebug_lock); list_add_tail(&dt->link, &ddebug_tables); mutex_unlock(&ddebug_lock); + if (di->num_class_refs) + ddebug_attach_client_module_classes(dt, di); + vpr_info("%3u debug prints in module %s\n", di->num_descs, modname); return 0; } @@ -1390,8 +1512,10 @@ static int __init dynamic_debug_init(void) struct _ddebug_info di = { .descs = __start___dyndbg, .classes = __start___dyndbg_classes, + .class_refs = __start___dyndbg_class_refs, .num_descs = __stop___dyndbg - __start___dyndbg, .num_classes = __stop___dyndbg_classes - __start___dyndbg_classes, + .num_class_refs = __stop___dyndbg_class_refs - __start___dyndbg_class_refs, }; if (&__start___dyndbg == &__stop___dyndbg) { From patchwork Fri Jan 13 19:30:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101534 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8321C678D6 for ; Fri, 13 Jan 2023 19:31:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6725310EAEA; Fri, 13 Jan 2023 19:31:02 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id D151C10EAD7; Fri, 13 Jan 2023 19:30:55 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id i17so6395769ila.9; Fri, 13 Jan 2023 11:30:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=yTR4ieke4SQncXKaVkcTEuYiRp/32On6yFfwWzPneBA=; b=lahi/KQ0DOsZB02/nhfjQxbV7OhjRTH7vLIlbkcZpeXdHg3dmYbzOG4jLw9mvXpXaK fNEH6Wf9z/A3AOI13fgKl+SB5r5Zxhsx+hlOPhyVRcULqBJh/XpYsFqsZjt5npG7TS+N xuy389egjEYb8wf95btNmwBIVA5D+eUuCKos5ClpCu8Ux6cBQpT/r6hbyOXikd0W2v6M dQxFtTq+A5arZm4We9HFCsVBEQ9s2GPnrqLqf9krJqC9T8axl7kwjzrK2Jc3IFCYizqF TjuDIG7Rt6DIQVQbMG5Ncv13v1Wg3aaLmIBkw8hwH/o8Jh39YxYH4zxiAGe5UHP8iTx5 apjQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yTR4ieke4SQncXKaVkcTEuYiRp/32On6yFfwWzPneBA=; b=iWue1hT+grIwqGA3H4UX70IEmBo41n7c3+YDmeLTLJaDAicUVhzNpYms5HjUPN0g3E ippWbCzRRbp7Au6uhM6BxBFFEotl5pNUB0lbCPi0PM4RfOt4JFXnOsCVOOuU3sy/wtCT 4HjJY4nenZSIxUuSsh4cyco+pve/faBc8q0pJV8yBbEfGBg6HVY3HhKf+IR5GFLMDhNm mPXbT95xqjG6hd7NI7hRpyGowDogNiXtRf2lDNFkSwOy0Kj5/uhwPgPAlaeFmm1LpJYA CESe7qDFHsXqHMsoRJem4QGa8afaa6ZhNcYU4YDLU33sE31Hwz4idhs5M3EF6oX5Ue+o aEbA== X-Gm-Message-State: AFqh2krZfbH2upBx89LaGydyTrCg6OdzCzW3BZVucErG7ZBvoQy5nx7z 895pqkUOyHCIxYwOgT5OEP0= X-Google-Smtp-Source: AMrXdXsgxUL3/qiDQID4zmfERkh2F5ouCmFPUZidaXKyo6mdOb6sKXD5GPfpUdc2o+e9QJcYwmp2cA== X-Received: by 2002:a92:4b0f:0:b0:30e:da56:d369 with SMTP id m15-20020a924b0f000000b0030eda56d369mr3600066ilg.7.1673638255047; Fri, 13 Jan 2023 11:30:55 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:54 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 12/20] dyndbg-API: DYNDBG_CLASSMAP_USE drop extra args Date: Fri, 13 Jan 2023 12:30:08 -0700 Message-Id: <20230113193016.749791-13-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Drop macro args after _var. Since DYNDBG_CLASSMAP_USE no longer forwards to DYNDBG_CLASSMAP_DEFINE, it doesn't need those args to forward. Keep only the _var arg, which is the extern'd struct classmap with all the class info. Signed-off-by: Jim Cromie --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 12 +--------- drivers/gpu/drm/display/drm_dp_helper.c | 12 +--------- drivers/gpu/drm/drm_crtc_helper.c | 12 +--------- drivers/gpu/drm/i915/i915_params.c | 12 +--------- drivers/gpu/drm/nouveau/nouveau_drm.c | 12 +--------- include/linux/dynamic_debug.h | 30 ++++++++++++++----------- 6 files changed, 22 insertions(+), 68 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 0075184b5d93..7bcc22ef5d49 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -189,17 +189,7 @@ int amdgpu_vcnfw_log; static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work); #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) -DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_USE(drm_debug_classes); #endif struct amdgpu_mgpu_info mgpu_info = { diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 8fa7a88299e7..3bc188cb1116 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -42,17 +42,7 @@ #include "drm_dp_helper_internal.h" #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) -DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_USE(drm_debug_classes); #endif struct dp_aux_backlight { diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 2f747c9c8f60..5fb83336b015 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -52,17 +52,7 @@ #include "drm_crtc_helper_internal.h" #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) -DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_USE(drm_debug_classes); #endif /** diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index b5b2542ae364..e959d0384ead 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -30,17 +30,7 @@ #include "i915_drv.h" #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) -DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_USE(drm_debug_classes); #endif #define i915_param_named(name, T, perm, desc) \ diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 2963cf5b0807..609edeb2a117 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -72,17 +72,7 @@ #include "nouveau_dmem.h" #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) -DYNDBG_CLASSMAP_USE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_USE(drm_debug_classes); #endif MODULE_PARM_DESC(config, "option string to pass to driver core"); diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 397ac8294230..91015d1a04e0 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -90,13 +90,15 @@ struct ddebug_class_map { }; /** - * DYNDBG_CLASSMAP_DEFINE - define the class_map that names the - * debug classes used in this module. This tells dyndbg the authorized - * classnames it should manipulate. - * @_var: a struct ddebug_class_map, passed to module_param_cb + * DYNDBG_CLASSMAP_DEFINE - define debug-classes used by a module. + * @_var: name of the classmap, exported for other modules coordinated use. * @_type: enum class_map_type, chooses bits/verbose, numeric/symbolic * @_base: offset of 1st class-name. splits .class_id space - * @classes: class-names used to control class'd prdbgs + * @classes: enum-map - symbol names are "classnames", vals are .class_ids + * + * @classes vals are _ddebug.class_ids used in the module, the symbol + * names are stringified; they authorize "class FOO" to >control. + * Connection to a kernel-param is done separately. */ #define DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, ...) \ const char *_var##_classnames[] = { __VA_ARGS__ }; \ @@ -116,16 +118,18 @@ struct ddebug_class_user { struct ddebug_class_map *map; }; /** - * DYNDBG_CLASSMAP_USE - Use a classmap DEFINEd in another module. - * This lets dyndbg initialize the dependent module's prdbgs from the - * other module's controlling sysfs node. + * DYNDBG_CLASSMAP_USE - refer to a classmap, DEFINEd elsewhere. + * @_var: name of the exported classmap + * + * This registers the module's use of another module's classmap defn, + * allowing dyndbg to find the controlling kparam, and propagate its + * settings to the dependent module being loaded. */ -#define DYNDBG_CLASSMAP_USE(_var, ...) \ - DYNDBG_CLASSMAP_USE_(_var, __UNIQUE_ID(ddebug_class_user), \ - __VA_ARGS__) -#define DYNDBG_CLASSMAP_USE_(_var, _uname, ...) \ +#define DYNDBG_CLASSMAP_USE(_var) \ + DYNDBG_CLASSMAP_USE_(_var, __UNIQUE_ID(ddebug_class_user)) +#define DYNDBG_CLASSMAP_USE_(_var, _uname) \ extern struct ddebug_class_map _var; \ - static struct ddebug_class_user __used \ + struct ddebug_class_user __used \ __section("__dyndbg_class_refs") _uname = { \ .user_mod_name = KBUILD_MODNAME, \ .map = &_var, \ From patchwork Fri Jan 13 19:30:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101535 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 23920C678D4 for ; Fri, 13 Jan 2023 19:31:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 759D310EAED; Fri, 13 Jan 2023 19:31:03 +0000 (UTC) Received: from mail-io1-xd36.google.com (mail-io1-xd36.google.com [IPv6:2607:f8b0:4864:20::d36]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2B61410EACC; Fri, 13 Jan 2023 19:30:57 +0000 (UTC) Received: by mail-io1-xd36.google.com with SMTP id r71so1949350iod.2; Fri, 13 Jan 2023 11:30:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UCMy5srul79X7KT33OmlYaakkzj66g1JNrQU8SnYexc=; b=S5WyJs3Hw5ptqfUDedR8F8xg3COF/DxPEXPaNfAaL3Gn4uJw0xcMxRKU0ivo8bcixO 2zcNdV9nzWncT0Jrvsy4+ED6vcFJOOMucJVPGK7T+8Xu0uZ+Yjo3Qoa1RfmEAO+EB7ws xpq1FDNA7xbcQx0EFhbTEeegzm+GjSEAOUB9A9NNAuuteIRDiqJdUI9pYzByHw/UREYP M+BWfnXBmIuqeepa0eMESzHZPtcUAtikTHJ/haNTky0NRl/O/R0yUGh1KilzHrgn9ovE iq25k9DdfvSO7bGJeiGdGkhod8Eq8yrRyuM0dc8oESDhAt93CC8o67dnITZnJ+hQbukx UPNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UCMy5srul79X7KT33OmlYaakkzj66g1JNrQU8SnYexc=; b=TfHLsC53yZmP2mWCtSs8ruT2w+yvigwjKhYzZjoi0hapk/dSJZeLYHfRXm7drvPPgu AGP5/ciuP9n9p3YUFvj7WcJPfo7o8jqm2doxJBZews/uhdT2K1OT/L0Le+ajH9UHxyez 63gbqZT7PIbxYF0vtdeMYsSWSW4koKBf5l9E6iP7scjTH/tpH9rIVb0j1U8xYIfe07XB hi0Q3EvU8ej2FiVPU0Voi/T2jLDIMK1bLQBqLO0Jiyb7wtjWbZdH4Gfcx8ajKN/aMwno qxx7bpdB+r5nEIwKamEv4Jwu4QB1/Ve8aN7HCFFPT6tyrpGUmVznVpz4APLvkrJq7Cmj k+sw== X-Gm-Message-State: AFqh2ko6DD3J5fzZ3Q/iAPmqgq4pYos4iXwuAA+XQQBSpx/MqVNzMg62 lzmBsgy16XS+JylyeBYSaP4= X-Google-Smtp-Source: AMrXdXvOuVr+sLAV0L6UoXP6hMZmBl49J+XcfrO8Nc9ylo4v3XiDhm90ku8xX0xs3Kf92EpN3j9Q2w== X-Received: by 2002:a5d:9945:0:b0:704:998f:a6d8 with SMTP id v5-20020a5d9945000000b00704998fa6d8mr902623ios.4.1673638256299; Fri, 13 Jan 2023 11:30:56 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:55 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 13/20] dyndbg-API: DYNDBG_CLASSMAP_DEFINE() improvements Date: Fri, 13 Jan 2023 12:30:09 -0700 Message-Id: <20230113193016.749791-14-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" patch 1 in this series fixed a CLASSMAP usage error, this improves the api so that misuse is less likely. changes here: 0- Add William Swanson's public domain map macro: https://github.com/swansontec/map-macro/blob/master/map.h this makes 1 possible. 1- classnames were formerly specified as strings: "DRM_UT_CORE" now they are the actual enum const symbols: DRM_UT_CORE direct use of symbols is tighter, more comprehensible by tools, grep 2- drop _base arg. _base was the value of the 1st classname that is now available due to 1, no need to require it 2x So take _base out of the API/kdoc. Note that the macro impl keeps the _base arg so that it can be used to set classmap.base, but reuses it in the MAP-stringify _base, __VA_ARGS__ expression. Also cleanup the API usage comment in test_dynamic_debug.c, and since comments in test-code might not be noticed, restate that here. Using the CLASSMAP api: - class-specifications are enum consts/symbols, like DRM_UT_CORE, DRM_UT_KMS, etc. their values define bits in the sysfs-node (like drm.debug) - they are stringified and accepted at >control echo class DRM_UT_CORE +p >control - multiple class-maps must share the per-module: 0-62 class_id space (by setting initial enum values to non-overlapping subranges) todo: fixup the 'i' prefix, a quick/dirty avoidance of MAP. NOTE: test_dynamic_debug.c also has this helper macro to wire a classmap to a drm.debug style parameter; its easier to just use it as a model/template as needed, rather than try to make it general enough to be an official API helper. define DD_SYS_WRAP(_model, _flags) \ static unsigned long bits_##_model; \ static struct ddebug_class_param _flags##_model = { \ .bits = &bits_##_model, \ .flags = #_flags, \ .map = &map_##_model, \ }; \ module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, &_flags##_model, 0600) Signed-off-by: Jim Cromie --- drivers/gpu/drm/drm_print.c | 22 +++++++------- include/drm/drm_print.h | 1 + include/linux/dynamic_debug.h | 17 ++++++----- include/linux/map.h | 54 +++++++++++++++++++++++++++++++++++ lib/test_dynamic_debug.c | 43 ++++++++++++++-------------- 5 files changed, 95 insertions(+), 42 deletions(-) create mode 100644 include/linux/map.h diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index 4b697e18238d..07c25241e8cc 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -56,17 +56,17 @@ MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug cat module_param_named(debug, __drm_debug, ulong, 0600); #else /* classnames must match vals of enum drm_debug_category */ -DYNDBG_CLASSMAP_DEFINE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "DRM_UT_CORE", - "DRM_UT_DRIVER", - "DRM_UT_KMS", - "DRM_UT_PRIME", - "DRM_UT_ATOMIC", - "DRM_UT_VBL", - "DRM_UT_STATE", - "DRM_UT_LEASE", - "DRM_UT_DP", - "DRM_UT_DRMRES"); +DYNDBG_CLASSMAP_DEFINE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, + DRM_UT_CORE, + DRM_UT_DRIVER, + DRM_UT_KMS, + DRM_UT_PRIME, + DRM_UT_ATOMIC, + DRM_UT_VBL, + DRM_UT_STATE, + DRM_UT_LEASE, + DRM_UT_DP, + DRM_UT_DRMRES); static struct ddebug_class_param drm_debug_bitmap = { .bits = &__drm_debug, diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index a44fb7ef257f..6a27e8f26770 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -333,6 +333,7 @@ static inline bool drm_debug_enabled_raw(enum drm_debug_category category) }) #if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) +//extern struct ddebug_class_map drm_debug_classes[]; /* * the drm.debug API uses dyndbg, so each drm_*dbg macro/callsite gets * a descriptor, and only enabled callsites are reachable. They use diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 91015d1a04e0..7cdfc4b533ae 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -7,6 +7,7 @@ #endif #include +#include /* * An instance of this structure is created in a special @@ -90,18 +91,16 @@ struct ddebug_class_map { }; /** - * DYNDBG_CLASSMAP_DEFINE - define debug-classes used by a module. - * @_var: name of the classmap, exported for other modules coordinated use. - * @_type: enum class_map_type, chooses bits/verbose, numeric/symbolic - * @_base: offset of 1st class-name. splits .class_id space - * @classes: enum-map - symbol names are "classnames", vals are .class_ids + * DYNDBG_CLASSMAP_DEFINE - define the debug classes used in this module. + * This tells dyndbg what debug classes it should control for the client. * - * @classes vals are _ddebug.class_ids used in the module, the symbol - * names are stringified; they authorize "class FOO" to >control. - * Connection to a kernel-param is done separately. + * @_var: struct ddebug_class_map, as passed to module_param_cb + * @_type: enum ddebug_class_map_type, chooses bits/verbose, numeric/symbolic + * @classes: enum class values used in module, such as: DRM_UT_* */ #define DYNDBG_CLASSMAP_DEFINE(_var, _maptype, _base, ...) \ - const char *_var##_classnames[] = { __VA_ARGS__ }; \ + const char *_var##_classnames[] = { \ + iMAP_LIST(__stringify, _base, __VA_ARGS__) }; \ struct ddebug_class_map __aligned(8) __used \ __section("__dyndbg_classes") _var = { \ .mod = THIS_MODULE, \ diff --git a/include/linux/map.h b/include/linux/map.h new file mode 100644 index 000000000000..4348313a596f --- /dev/null +++ b/include/linux/map.h @@ -0,0 +1,54 @@ +/* + * Created by William Swanson in 2012. + * + * I, William Swanson, dedicate this work to the public domain. + * I waive all rights to the work worldwide under copyright law, + * including all related and neighboring rights, + * to the extent allowed by law. + * + * You can copy, modify, distribute and perform the work, + * even for commercial purposes, all without asking permission. + */ + +#ifndef MAP_H_INCLUDED +#define MAP_H_INCLUDED + +#define iEVAL0(...) __VA_ARGS__ +#define iEVAL1(...) iEVAL0(iEVAL0(iEVAL0(__VA_ARGS__))) +#define iEVAL2(...) iEVAL1(iEVAL1(iEVAL1(__VA_ARGS__))) +#define iEVAL3(...) iEVAL2(iEVAL2(iEVAL2(__VA_ARGS__))) +#define iEVAL4(...) iEVAL3(iEVAL3(iEVAL3(__VA_ARGS__))) +#define iEVAL(...) iEVAL4(iEVAL4(iEVAL4(__VA_ARGS__))) + +#define iMAP_END(...) +#define iMAP_OUT +#define iMAP_COMMA , + +#define iMAP_GET_END2() 0, iMAP_END +#define iMAP_GET_END1(...) iMAP_GET_END2 +#define iMAP_GET_END(...) iMAP_GET_END1 +#define iMAP_NEXT0(test, next, ...) next iMAP_OUT +#define iMAP_NEXT1(test, next) iMAP_NEXT0(test, next, 0) +#define iMAP_NEXT(test, next) iMAP_NEXT1(iMAP_GET_END test, next) + +#define iMAP0(f, x, peek, ...) f(x) iMAP_NEXT(peek, iMAP1)(f, peek, __VA_ARGS__) +#define iMAP1(f, x, peek, ...) f(x) iMAP_NEXT(peek, iMAP0)(f, peek, __VA_ARGS__) + +#define iMAP_LIST_NEXT1(test, next) iMAP_NEXT0(test, iMAP_COMMA next, 0) +#define iMAP_LIST_NEXT(test, next) iMAP_LIST_NEXT1(iMAP_GET_END test, next) + +#define iMAP_LIST0(f, x, peek, ...) f(x) iMAP_LIST_NEXT(peek, iMAP_LIST1)(f, peek, __VA_ARGS__) +#define iMAP_LIST1(f, x, peek, ...) f(x) iMAP_LIST_NEXT(peek, iMAP_LIST0)(f, peek, __VA_ARGS__) + +/** + * Applies the function macro `f` to each of the remaining parameters. + */ +#define iMAP(f, ...) iEVAL(iMAP1(f, __VA_ARGS__, ()()(), ()()(), ()()(), 0)) + +/** + * Applies the function macro `f` to each of the remaining parameters and + * inserts commas between the results. + */ +#define iMAP_LIST(f, ...) iEVAL(iMAP_LIST1(f, __VA_ARGS__, ()()(), ()()(), ()()(), 0)) + +#endif diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 8d384b979e74..e678884066bf 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -33,11 +33,10 @@ module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600); /* * Using the CLASSMAP api: - * - classmaps must have corresponding enum - * - enum symbols must match/correlate with class-name strings in the map. - * - base must equal enum's 1st value - * - multiple maps must set their base to share the 0-30 class_id space !! - * (build-bug-on tips welcome) + * - class-names are enum consts/symbols, like DRM_UT_CORE, DRM_UT_KMS, etc + * - those names are accepted at >control interface + * - multiple class-maps must share the per-module: 0-62 class_id space + * (by setting initial enum values to non-overlapping subranges) * Additionally, here: * - tie together sysname, mapname, bitsname, flagsname */ @@ -62,38 +61,38 @@ enum cat_disjoint_bits { D2_LEASE, D2_DP, D2_DRMRES }; -DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, 0, - "D2_CORE", - "D2_DRIVER", - "D2_KMS", - "D2_PRIME", - "D2_ATOMIC", - "D2_VBL", - "D2_STATE", - "D2_LEASE", - "D2_DP", - "D2_DRMRES"); +DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, + D2_CORE, + D2_DRIVER, + D2_KMS, + D2_PRIME, + D2_ATOMIC, + D2_VBL, + D2_STATE, + D2_LEASE, + D2_DP, + D2_DRMRES); DD_SYS_WRAP(disjoint_bits, p); DD_SYS_WRAP(disjoint_bits, T); /* symbolic input, independent bits */ enum cat_disjoint_names { LOW = 10, MID, HI }; -DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, - "LOW", "MID", "HI"); +DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, + LOW, MID, HI); DD_SYS_WRAP(disjoint_names, p); DD_SYS_WRAP(disjoint_names, T); /* numeric verbosity, V2 > V1 related */ enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 }; -DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, - "V0", "V1", "V2", "V3", "V4", "V5", "V6", "V7"); +DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, + V0, V1, V2, V3, V4, V5, V6, V7); DD_SYS_WRAP(level_num, p); DD_SYS_WRAP(level_num, T); /* symbolic verbosity */ enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 }; -DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, 22, - "L0", "L1", "L2", "L3", "L4", "L5", "L6", "L7"); +DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, + L0, L1, L2, L3, L4, L5, L6, L7); DD_SYS_WRAP(level_names, p); DD_SYS_WRAP(level_names, T); From patchwork Fri Jan 13 19:30:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101532 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 928B0C54EBD for ; Fri, 13 Jan 2023 19:31:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 136C110EAE2; Fri, 13 Jan 2023 19:31:02 +0000 (UTC) Received: from mail-il1-x135.google.com (mail-il1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0370710EADA; Fri, 13 Jan 2023 19:30:58 +0000 (UTC) Received: by mail-il1-x135.google.com with SMTP id u8so11214122ilq.13; Fri, 13 Jan 2023 11:30:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=aRyUl1j2CeLT2msyDi6y9qIAncSGOoQz3PjuRO1TezA=; b=iziQWeBJgoiaMWnT+DGKeHRFoxOg8Y//x6gVDHTO/o/B4A2YM/jQhz7hOa75kni4T0 mENNP100auhPgXQopX+LQvdAUY+0nOJ/rj9kM64uDIVIOpiPwFwEYZyZagsSNUKXoJoT 8fUlesHV9DvTWZ6X031dT4qAHFMG1Rr80Q/mR9+vzpDC0++MWi6MKKM4zBwpTSNvAuVI 9VUcAIV2UMhcADTgaUB2SqjfobS982vS5b/639ZvSEiS7/aAsWMM38zXDLuV7Yjmndjm q0WFuObgL8VxnpyJ+sHbRJRJXhPMARzB2VyhnINlSLyAwmXDUahnRjHIgV5sebJwH44a euBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=aRyUl1j2CeLT2msyDi6y9qIAncSGOoQz3PjuRO1TezA=; b=Hhs4EJYBlltStYHoKTsSHVDDa75YyVeVmW6pjiaGN0K/gFdIpPRoIc/aG1KiHzHuDv 3Lz3NIjImTpuCmzMZrV8/299P4KgzCGIf6DnD7ev+JEoGDAQq9BAyubxfRzpUXcXJcN/ TkYUnt8XkhS91DC52CiD0ZLcH1QB8NELUid6hnB8/XwE/5SWmiprWmpq/24UEXheWw5W hxlrRICcBDHupUaie8rabdXcaZt9w5khFI7fQRKpwkpNTCkPwzIIxpPG9bUboMUWypyY 7XcyiiZGCEk8/Ei9WZ5AIGJ1n+ZbYJaIUF+cqPOP3yMGqbzjJVsFVXwX2zWx6zUbIw/z IBLg== X-Gm-Message-State: AFqh2kpXosjiPCFytT7UuxvmdAU2FheiYgCxag20h4ZiKTnl3G7U7xly NQd1OAMZKSW8AKxCLkBX/7s= X-Google-Smtp-Source: AMrXdXtwfdAQ6WeQoeGyy+hEpdL1j6Nxnj9lnlS5pzsW0VhG/1M2+Rzc92ciwmwipotWIf+SkViSfA== X-Received: by 2002:a92:7f03:0:b0:30c:54a1:e5d8 with SMTP id a3-20020a927f03000000b0030c54a1e5d8mr30477229ild.30.1673638257652; Fri, 13 Jan 2023 11:30:57 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:57 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 14/20] drm_print: fix stale macro-name in comment Date: Fri, 13 Jan 2023 12:30:10 -0700 Message-Id: <20230113193016.749791-15-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Cited commit uses stale macro name, fix this, and explain better. When DRM_USE_DYNAMIC_DEBUG=y, DYNDBG_CLASSMAP_DEFINE() maps DRM_UT_* onto BITs in drm.debug. This still uses enum drm_debug_category, but it is somewhat indirect, with the ordered set of DRM_UT_* enum-vals. This requires that the macro args: DRM_UT_* list must be kept in sync and in order. Fixes: f158936b60a7 ("drm: POC drm on dyndbg - use in core, 2 helpers, 3 drivers.") Signed-off-by: Jim Cromie --- . emphasize ABI non-change despite enum val change - Jani Nikula . reorder to back of patchset to follow API name changes. --- include/drm/drm_print.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index 6a27e8f26770..7695ba31b3a4 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -276,7 +276,10 @@ static inline struct drm_printer drm_err_printer(const char *prefix) * */ enum drm_debug_category { - /* These names must match those in DYNAMIC_DEBUG_CLASSBITS */ + /* + * Keep DYNDBG_CLASSMAP_DEFINE args in sync with changes here, + * the enum-values define BIT()s in drm.debug, so are ABI. + */ /** * @DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, * drm_memory.c, ... From patchwork Fri Jan 13 19:30:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101537 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E2B49C677F1 for ; Fri, 13 Jan 2023 19:31:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1E5C410EAF2; Fri, 13 Jan 2023 19:31:05 +0000 (UTC) Received: from mail-il1-x12e.google.com (mail-il1-x12e.google.com [IPv6:2607:f8b0:4864:20::12e]) by gabe.freedesktop.org (Postfix) with ESMTPS id AC3AE10EADF; Fri, 13 Jan 2023 19:30:59 +0000 (UTC) Received: by mail-il1-x12e.google.com with SMTP id v6so1707600ilq.3; Fri, 13 Jan 2023 11:30:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=oflCfmI+To4S37iZ6t08kU0uJ39RtZq/82Mw2ARcM4o=; b=boR7+PhjjreSbcb2CFMZ8IGN4V1ff1LGHcDj/cYpWNrXNK+1kEtpRjBfDvMJEgWp3X TOs7VlqymYk/vX9zrTZvF9TMgdL6ASgebePP2TThFG3nrUtkdttP9gOiiyox4gFSfmxf npzxy4DPSUFSRkh/nFvDWxgPLvhBfbFV/FoOuG41AJdtv86TJhQ43jBiK8RsZhv31tZM BN3qHsBxiSif7yHeryIuD8J0aN9K+z8XTpyuU/vnupaqz63HRshjgh/eInP2RqfzztjI EIpS8acbttsYtqTF14QoH39rSELMU/mEmNfMES9CC0P59JvgHBtxyyquCaOIPF60e/V1 H7RQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oflCfmI+To4S37iZ6t08kU0uJ39RtZq/82Mw2ARcM4o=; b=qwnVYHUrI0NUFZ0Uw+Kd4GzV5oYwBR0pTzLB75AluUq6TXq0zfyhJw85qKmYax158z QWwX8/cnHzZMjYNzMw2jFdqbWx6WFpqWIlmGwlZUXXQM9F9I0UMahcu6vCZBZYKmwosV 8X24ctmr1cB+JFWGbpmMnLYE0WTwtnPbJEspCWJXphgyXzAg5p684KagIUwCfNghamdj JHHmj2k/pcNAn9Y8P76Sq0LPlTOQfScqQuX0iVNyGQ6UVDpOtCfrdLcl/C8FuGEa5CcA PeArbFf5b8YSrHZrS0kfxkt20wCSCdbmkHQF3/Bp2+2uD1fyyGMHTVzk8ju6weyXKgGh UgYw== X-Gm-Message-State: AFqh2kqlIsgZUTb/AcCMKIStDY5zu1MNkU7lMguzs6PUkn9CU7EVqW2D SmLQWWOGBBYdGdyp0xVFJSY= X-Google-Smtp-Source: AMrXdXvkUeNjsRv+x3kOF1bN+++9C2WbmGJXER7bc6ntCQtuKLR6ABMmuBJO8/FkGaZwdYy+rP4ZfQ== X-Received: by 2002:a05:6e02:108:b0:30c:5c54:c264 with SMTP id t8-20020a056e02010800b0030c5c54c264mr29478009ilm.13.1673638258905; Fri, 13 Jan 2023 11:30:58 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:58 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 15/20] test-dyndbg: build test_dynamic_debug_submod Date: Fri, 13 Jan 2023 12:30:11 -0700 Message-Id: <20230113193016.749791-16-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" CONFIG_DRM_USE_DYNAMIC_DEBUG=y has a regression; drm subsystem modules, which depend upon drm.ko and use the drm.debug API, do not get enabled when __drm_debug is set by `modprobe drm debug=0x1f`. With =N, __drm_debug is checked before logging the msg, so the end-of-modprobe debug=$init affected all later checks. But with =y, each run-time check is replaced by a static-key that is set at end-of-modprobe. This creates a chicken-egg dependency; i915 must be modprobed before its drm.debugs are enabled, but drm.ko (and __drm_debug=$init) must be done before modprobe i915, so its callsites arent there yet to be enabled. The WIP-fix is to split DECLARE_DYNDBG_CLASSMAP to: DYNDBG_CLASSMAP_DEFINE - invoked in 'parent' DYNDBG_CLASSMAP_USE - invoked in dependent, to USE the exported definition To prove the fix w/o involving DRM, we need 2 modules, one dependent on the other. Add test_dynamic_debug_submod.ko, which _USEs the classmaps _exported by test_dynamic_debug.ko To keep code to a minimum, test_dynamic_debug.c ifdefs on TEST_DYNAMIC_DEBUG_SUBMOD to build either parent or dependent, with either DYNDBG_CLASSMAP_DEFINE or DYNDBG_CLASSMAP_USE blocks. So test_dynamic_debug_submod.c is just 2 lines: include parent after defining SUBMOD. This also gives the 2 modules identical logging behavior as a baseline. Signed-off-by: Jim Cromie --- lib/Makefile | 3 +- lib/test_dynamic_debug.c | 50 ++++++++++++++++++++++++++++----- lib/test_dynamic_debug_submod.c | 10 +++++++ 3 files changed, 55 insertions(+), 8 deletions(-) create mode 100644 lib/test_dynamic_debug_submod.c diff --git a/lib/Makefile b/lib/Makefile index 59bd7c2f793a..0f04c59bdc8e 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -78,7 +78,7 @@ obj-$(CONFIG_TEST_SORT) += test_sort.o obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o -obj-$(CONFIG_TEST_DYNAMIC_DEBUG) += test_dynamic_debug.o +obj-$(CONFIG_TEST_DYNAMIC_DEBUG) += test_dynamic_debug.o test_dynamic_debug_submod.o obj-$(CONFIG_TEST_PRINTF) += test_printf.o obj-$(CONFIG_TEST_SCANF) += test_scanf.o obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o @@ -100,6 +100,7 @@ obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE) obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o + # # CFLAGS for compiling floating point code inside the kernel. x86/Makefile turns # off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index e678884066bf..39d4f63cade1 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -6,7 +6,11 @@ * Jim Cromie */ -#define pr_fmt(fmt) "test_dd: " fmt +#if defined(TEST_DYNAMIC_DEBUG_SUBMOD) + #define pr_fmt(fmt) "test_dd_submod: " fmt +#else + #define pr_fmt(fmt) "test_dd: " fmt +#endif #define DEBUG /* enable all prdbgs (plain & class'd) at compiletime */ @@ -49,6 +53,13 @@ module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600); }; \ module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, &_flags##_model, 0600) +/* + * dynamic-debug imitates drm.debug model's use of enums (DRM_UT_CORE + * etc) to define it's classes/categories. dyndbg allows class-id's + * 0..62, reserving 63 for plain old (non-class'd) prdbgs. A module + * can define multiple classmaps, as long as they share the range. + */ + /* numeric input, independent bits */ enum cat_disjoint_bits { D2_CORE = 0, @@ -61,7 +72,36 @@ enum cat_disjoint_bits { D2_LEASE, D2_DP, D2_DRMRES }; + +/* symbolic input, independent bits */ +enum cat_disjoint_names { LOW = 10, MID, HI }; + +/* numeric verbosity, V2 > V1 related */ +enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 }; + +/* symbolic verbosity */ +enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 }; + +#if defined(TEST_DYNAMIC_DEBUG_SUBMOD) + +/* use the classmaps defined in 'parent' module below */ +DYNDBG_CLASSMAP_USE(map_disjoint_bits); +DYNDBG_CLASSMAP_USE(map_disjoint_names); +DYNDBG_CLASSMAP_USE(map_level_num); +DYNDBG_CLASSMAP_USE(map_level_names); + +#else + +/* + * parent module, define a classmap of each of 4 types. + * enum values are class-ids + * enum symbols are stringified, used as classnames + * param bits are mapped in order: 0..N + * (a straight, obvious, linear map is encouraged) + */ + DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, + /* bits 0..N of param are mapped to these class-ids */ D2_CORE, D2_DRIVER, D2_KMS, @@ -75,27 +115,23 @@ DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, DD_SYS_WRAP(disjoint_bits, p); DD_SYS_WRAP(disjoint_bits, T); -/* symbolic input, independent bits */ -enum cat_disjoint_names { LOW = 10, MID, HI }; DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, LOW, MID, HI); DD_SYS_WRAP(disjoint_names, p); DD_SYS_WRAP(disjoint_names, T); -/* numeric verbosity, V2 > V1 related */ -enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 }; DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, V0, V1, V2, V3, V4, V5, V6, V7); DD_SYS_WRAP(level_num, p); DD_SYS_WRAP(level_num, T); -/* symbolic verbosity */ -enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 }; DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, L0, L1, L2, L3, L4, L5, L6, L7); DD_SYS_WRAP(level_names, p); DD_SYS_WRAP(level_names, T); +#endif /* TEST_DYNAMIC_DEBUG_SUBMOD */ + /* stand-in for all pr_debug etc */ #define prdbg(SYM) __pr_debug_cls(SYM, #SYM " msg\n") diff --git a/lib/test_dynamic_debug_submod.c b/lib/test_dynamic_debug_submod.c new file mode 100644 index 000000000000..f4ee7a6d6989 --- /dev/null +++ b/lib/test_dynamic_debug_submod.c @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Kernel module for testing dynamic_debug + * + * Authors: + * Jim Cromie + */ + +#define TEST_DYNAMIC_DEBUG_SUBMOD +#include "test_dynamic_debug.c" From patchwork Fri Jan 13 19:30:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101540 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E59DBC678D4 for ; Fri, 13 Jan 2023 19:31:53 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1D6E10EAE7; Fri, 13 Jan 2023 19:31:08 +0000 (UTC) Received: from mail-il1-x12f.google.com (mail-il1-x12f.google.com [IPv6:2607:f8b0:4864:20::12f]) by gabe.freedesktop.org (Postfix) with ESMTPS id CC4C710EAE8; Fri, 13 Jan 2023 19:31:00 +0000 (UTC) Received: by mail-il1-x12f.google.com with SMTP id h11so243142ilc.1; Fri, 13 Jan 2023 11:31:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=lwY51vCw5d2KWkq9unQZFSxtB1BKyvHEDbc8ZQVYmz0=; b=CxnhZR5Y4ZqJM1g634VwuFdLi5atSc7D5VIBKBW4dLrTEiW4v7UroCjNzfjavsTB6l czTKGH/1v/EQ4SPhDpqRz3aXY/1yQyiIf0yzIQ0ufjpJ5SU++Qo0pB1XlJS1iu49H7aO JHgVBJlPWzjp4+bvJxR9fIRii0Gs4XI4Zo0bUf06hwsH0rcNREFeup9n0mHKJwLTUDlF j8lC5BrgL1iXoAMypRD80MVctJKsGsdsR4KplNoM7d/1WsIz8LbIVS0OgTKNyRuDMX49 C/dyfePZmrS56rgdN3I51NH9pjQVxpPbavtNokoj2eTPuzhSUqVYpYAlbdIKZ+IS5pkA Q4Wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lwY51vCw5d2KWkq9unQZFSxtB1BKyvHEDbc8ZQVYmz0=; b=CRQbhZ3gZ2FB+NpObRqWD6Td23nErtsT33Np0zuwKwkiFv4W2EdnWOYkeY6zhoyE9v mum2mgEhoZkBwsWAzqINn1z8r85sFkf4MKKkDcqiRFbaf0m2E3fA1laUMUDdsHaciO65 6W4sN+oVAujhmxqIHEgKC8cGwme9yigMm+dTL3pp5Ufxs0RFi0vzW6QYm5d+UfrZ3FY5 DKf35L7SdJTaCd5TcdePHjjGtetFGhxay3BIUKALd3AS1mZQ3bStIs00PEC5Pg+H6CC8 fXoAPubVE9nmglFM+RsCCyYd1YqKnK6SPDtNVWMg6a1Kze0X/7y3Al7lqMcG31tgJ5ku Z0+Q== X-Gm-Message-State: AFqh2kp/AS8PsnekwWnslzaEyeqYuLjsvxunkFAkJXAMb6XgYNoLqxBK c9GQM0LBFbOaRcn1QVO3WBs= X-Google-Smtp-Source: AMrXdXuepQxNSSHHm82kCfNKgO7OiaA997T8L5znxd8j+HTMb8MJP9lC3JyWYsL9Fkv+3uS13K2KjQ== X-Received: by 2002:a92:c6d0:0:b0:303:9287:3af7 with SMTP id v16-20020a92c6d0000000b0030392873af7mr60731571ilm.4.1673638260085; Fri, 13 Jan 2023 11:31:00 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.30.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:30:59 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 16/20] test-dyndbg: rename DD_SYS_WRAP to DYNDBG_CLASSMAP_PARAM Date: Fri, 13 Jan 2023 12:30:12 -0700 Message-Id: <20230113193016.749791-17-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Original name was a punt; but the macro is maybe general enough to put in the API later. Rename and improve the macro towards that end. Also tweak internal name constructed in the macro, to add a '_' between the name components. This changes the .i file only. no functional change. Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 39d4f63cade1..45e123b29a9b 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -44,14 +44,15 @@ module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600); * Additionally, here: * - tie together sysname, mapname, bitsname, flagsname */ -#define DD_SYS_WRAP(_model, _flags) \ +#define DYNDBG_CLASSMAP_PARAM(_model, _flags) \ static unsigned long bits_##_model; \ - static struct ddebug_class_param _flags##_model = { \ + static struct ddebug_class_param _flags##_##_model = { \ .bits = &bits_##_model, \ .flags = #_flags, \ .map = &map_##_model, \ }; \ - module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, &_flags##_model, 0600) + module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, \ + &_flags##_##_model, 0600) /* * dynamic-debug imitates drm.debug model's use of enums (DRM_UT_CORE @@ -112,23 +113,23 @@ DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, D2_LEASE, D2_DP, D2_DRMRES); -DD_SYS_WRAP(disjoint_bits, p); -DD_SYS_WRAP(disjoint_bits, T); +DYNDBG_CLASSMAP_PARAM(disjoint_bits, p); +DYNDBG_CLASSMAP_PARAM(disjoint_bits, T); DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, LOW, MID, HI); -DD_SYS_WRAP(disjoint_names, p); -DD_SYS_WRAP(disjoint_names, T); +DYNDBG_CLASSMAP_PARAM(disjoint_names, p); +DYNDBG_CLASSMAP_PARAM(disjoint_names, T); DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, V0, V1, V2, V3, V4, V5, V6, V7); -DD_SYS_WRAP(level_num, p); -DD_SYS_WRAP(level_num, T); +DYNDBG_CLASSMAP_PARAM(level_num, p); +DYNDBG_CLASSMAP_PARAM(level_num, T); DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, L0, L1, L2, L3, L4, L5, L6, L7); -DD_SYS_WRAP(level_names, p); -DD_SYS_WRAP(level_names, T); +DYNDBG_CLASSMAP_PARAM(level_names, p); +DYNDBG_CLASSMAP_PARAM(level_names, T); #endif /* TEST_DYNAMIC_DEBUG_SUBMOD */ From patchwork Fri Jan 13 19:30:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101542 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B8542C677F1 for ; Fri, 13 Jan 2023 19:31:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C1C410EAD5; Fri, 13 Jan 2023 19:31:10 +0000 (UTC) Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by gabe.freedesktop.org (Postfix) with ESMTPS id 61F2B10EAE1; Fri, 13 Jan 2023 19:31:01 +0000 (UTC) Received: by mail-il1-x131.google.com with SMTP id h26so11225218ila.11; Fri, 13 Jan 2023 11:31:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=sXtZaooZ45JiB4b6dTyLmd0EG5FQixGlgDB25zw6+E4=; b=WilaoJVI3YuxchGiCcrK3zBv9B+yXVCKf7HtcgZ7GEGn+bZVJADzIBemXqTfws+FsU yX8BOLN/2Y9uvpkAW/0tHxItxH2t9f54BIJMd+bEO4h/I2ShfDrNsf4bgbeVJOLta0T5 4iKxs16V2MhWJf90+7+ewR6vNwB9maVvQRPiVPq3wH0AwkKr8AJnu9nsNWYwAqNBHWA1 Wsa39pOO57OQlA4skLoav1ADNWoWY0ibbAT2U5FGEBLefrVCFDZIweFkd5Bkh7gnq7qt zOKnwm4MMk8U4BIEPj2fIEKFaO5X3YBs6lmZf9S5iGIUwZFsocRElG6WlWFvXLXNCuCW VPSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=sXtZaooZ45JiB4b6dTyLmd0EG5FQixGlgDB25zw6+E4=; b=KHvIBCVGQOfkS1y6+TgksXMbZVg+d7Dy2AibETXnYbbmPcVUQz1YM4cBd7HT0fw0S2 XgJVzer6LAWrLC5DfSuCStWioe2X7QsXl3icue4vnKDsRZ3gAqEUj1/baC9TTMqWazsj 7awKx+hpnGhgZ7da7k6Ge/2UzMInqD7UxVcXp4ceCG1gUN0Kfrg67bvhkGQ41EHcwgxt 4WYXTAlW6kSc6zs8psHMGGdViqnkCNENYj2Oj0rED+2kNz/gpR3OF2lyGA6OiQPx0h+/ jeSsBZfUKEt9ey/SpQLSYhwpQproGrRmbAKY2oEUBudkCMqOCEdEEqSrPN9Bu+BPU/M7 0RJw== X-Gm-Message-State: AFqh2kpyJWM+HT+3edWc+mZnOWYl5XJ/nPjCR1w+ZR3BZ67WpHWWpSqW gdk2qmkaVnek1c9Ei44t3Wc= X-Google-Smtp-Source: AMrXdXsrMaDJ+qnbKaUj7ZlrxW3dvJ4frh8HAEVmIwYKqJASSo9Im4/1fW4l0and/BelKRWmXYmbfw== X-Received: by 2002:a92:d8cb:0:b0:30e:ebc9:f19d with SMTP id l11-20020a92d8cb000000b0030eebc9f19dmr274283ilo.25.1673638261006; Fri, 13 Jan 2023 11:31:01 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.31.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:31:00 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 17/20] test-dyndbg: disable WIP dyndbg-trace params Date: Fri, 13 Jan 2023 12:30:13 -0700 Message-Id: <20230113193016.749791-18-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The dyndbg-to-trace feature is WIP, and not in mainline, so the presence of the interface to use/test it is unhelpful/confusing. So define DYNDBG_CLASSMAP_PARAM_T() as DYNDBG_CLASSMAP_PARAM() or blank, depending upon ifdef DYDBG_TRACE, and update 4 params controlling the T-flag to use it. Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 45e123b29a9b..9e66c5a7e138 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -54,6 +54,14 @@ module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600); module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, \ &_flags##_##_model, 0600) +/* TBD */ +#ifdef DYNDBG_TRACE +#define DYNDBG_CLASSMAP_PARAM_T(_model, _flags) \ + DYNDBG_CLASSMAP_PARAM(_model, _flags) +#else +#define DYNDBG_CLASSMAP_PARAM_T(_model, _flags) +#endif + /* * dynamic-debug imitates drm.debug model's use of enums (DRM_UT_CORE * etc) to define it's classes/categories. dyndbg allows class-id's @@ -114,22 +122,22 @@ DYNDBG_CLASSMAP_DEFINE(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, D2_DP, D2_DRMRES); DYNDBG_CLASSMAP_PARAM(disjoint_bits, p); -DYNDBG_CLASSMAP_PARAM(disjoint_bits, T); +DYNDBG_CLASSMAP_PARAM_T(disjoint_bits, T); DYNDBG_CLASSMAP_DEFINE(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, LOW, MID, HI); DYNDBG_CLASSMAP_PARAM(disjoint_names, p); -DYNDBG_CLASSMAP_PARAM(disjoint_names, T); +DYNDBG_CLASSMAP_PARAM_T(disjoint_names, T); DYNDBG_CLASSMAP_DEFINE(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, V0, V1, V2, V3, V4, V5, V6, V7); DYNDBG_CLASSMAP_PARAM(level_num, p); -DYNDBG_CLASSMAP_PARAM(level_num, T); +DYNDBG_CLASSMAP_PARAM_T(level_num, T); DYNDBG_CLASSMAP_DEFINE(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, L0, L1, L2, L3, L4, L5, L6, L7); DYNDBG_CLASSMAP_PARAM(level_names, p); -DYNDBG_CLASSMAP_PARAM(level_names, T); +DYNDBG_CLASSMAP_PARAM_T(level_names, T); #endif /* TEST_DYNAMIC_DEBUG_SUBMOD */ From patchwork Fri Jan 13 19:30:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101541 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B6B28C3DA78 for ; Fri, 13 Jan 2023 19:31:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AC5FE10EB08; Fri, 13 Jan 2023 19:31:10 +0000 (UTC) Received: from mail-io1-xd36.google.com (mail-io1-xd36.google.com [IPv6:2607:f8b0:4864:20::d36]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0AA3610EAE8; Fri, 13 Jan 2023 19:31:02 +0000 (UTC) Received: by mail-io1-xd36.google.com with SMTP id e129so10917515iof.3; Fri, 13 Jan 2023 11:31:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=laxP0cqPnvjzU/NVL1/q3C0zcn02Ez3sXy575b6QzqM=; b=XXSx22eBM6VnY8ejlGtEMdfoZjJ3OiTi64CMb06ipUrdEJmLwhadms05YP+ol2KXV2 Ddy+diEX5ev4IyecNZvWF7QOGNcUrCK02QBT1Ep2bNonkDZwFIqI3dA/M9I5YNGmpQDK V4NnhFoRPOoNBVgkyJ1VDKj2kIuyInF8x09o+O4Omb/O0iO9W92Bh0y+iAI4ieBokskM GlZbrqKCuYCQ/RqHLiR90yg2nNAi/XByAO93xN84Jl+PiMrZkmCV5LG0B+HVE7FSSaXA HCJ4DjRGMYLRvb/Kzc8M+FrPZaxNf7VGB9950Swjb/4dHy5Mfa6AhiaU92lfRN8yryaf nRKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=laxP0cqPnvjzU/NVL1/q3C0zcn02Ez3sXy575b6QzqM=; b=couZ4i3a9xhK542UHfT0xya0VY5J2NThgvd+IWB8eJ1qtvZVEwmVNCjWo2TT9OZwKV TJkGlruJCXbnr+fyWeHGaeAhbQMI60A9pIsUn7xaZu3H5EVSsxr292HvPdJlSjhGMadi in9+iAJFa363/JlknTUtbf6FKvWTsidD9/gezgWZI8GyaKaSv/m2xeyIk+hXSLlIUqGR FE+925NdeV+1IaAv0oeUbAmy4L2JM3wyLmM65z2XE1Zv4PbM4jaIw3a0HjFqQc7lidWl pZLkxgEY/1vlTC9853iU41FeYMFnv5TrwXveIlibWaSDl36Nh+i5GqAgH+BEAIKlter6 iUZw== X-Gm-Message-State: AFqh2koQ6VgzwgzdvcW+UAoNvkMHcB0Oi2YTemimYSnzSwB+S0NjTl9f dEDL+z+ZB+Iiue06SIHPPwQ= X-Google-Smtp-Source: AMrXdXvySgqyyHiwPQgzdqFJMy9XZkUn/CSiJF+4a7KIIBwdYMgf6mxSxnMSXWGNu6PaWP7AR3g3CQ== X-Received: by 2002:a05:6602:87:b0:704:57c7:e440 with SMTP id h7-20020a056602008700b0070457c7e440mr6700670iob.5.1673638262108; Fri, 13 Jan 2023 11:31:02 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.31.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:31:01 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 18/20] test-dyndbg: tune sub-module behavior Date: Fri, 13 Jan 2023 12:30:14 -0700 Message-Id: <20230113193016.749791-19-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" lib/test_dynamic_debug.c is used to build 2 modules: test_dynamic_debug.ko and test_dynamic_debug_submod.ko Define DEBUG only in the main module, not in the submod. Its purpose is to insure that prdbgs are enabled by default, so that a modprobe without params actually logs something, showing that compile-time enablement works. This doesn't need to be repeated in the submodule. Rather, the submodule's purpose is to prove that classmaps defined and exported from a parent module are propagated to submodules, setting their class'd debugs accordingly. Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index 9e66c5a7e138..94fe3b3438d0 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -6,13 +6,13 @@ * Jim Cromie */ -#if defined(TEST_DYNAMIC_DEBUG_SUBMOD) - #define pr_fmt(fmt) "test_dd_submod: " fmt -#else +#if !defined(TEST_DYNAMIC_DEBUG_SUBMOD) #define pr_fmt(fmt) "test_dd: " fmt + #define DEBUG /* enable all prdbgs (plain & class'd) at compiletime */ +#else + #define pr_fmt(fmt) "test_dd_submod: " fmt #endif -#define DEBUG /* enable all prdbgs (plain & class'd) at compiletime */ #include From patchwork Fri Jan 13 19:30:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101543 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D4F7AC678D7 for ; Fri, 13 Jan 2023 19:31:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF5F010EB13; Fri, 13 Jan 2023 19:31:14 +0000 (UTC) Received: from mail-il1-x135.google.com (mail-il1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8D74910EAEE; Fri, 13 Jan 2023 19:31:03 +0000 (UTC) Received: by mail-il1-x135.google.com with SMTP id u8so11214261ilq.13; Fri, 13 Jan 2023 11:31:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=uMbqFdT/JDbk6t20JvgexRk0zFVQ3CnaOgmAmhMmoxs=; b=fKgaTMeKfzcqUfAoemEcsC8YuW2QdVhaDfa6TQ7dB9H++nXnzumgfjDbDOaSXTlsiI 8l2owubojC/NE1uAXHlOSh6N7FChBcCf5jPSaT1lfB98BZm89yNIJ+IvYRUPl1C2wcEc bMF4k8sPQB9TtECRFYzDFROaP3Dk4ZBn9M89opTudqwUuQsLOx0pY+Gwai7EbueylZ7z HTYZ27hIsC+v/TAhy5OFLTsAHB3rbwSTXW70Zl1NM4ZzSb/+oHctn+IdG3/DwnhJXzBF OtnQKGdkAxIYZmqUWiu5JdLVXtBVGrXrt0rVEvp6zXxt7zDyhkfeWq2A13rOHoMJbN1s WEQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uMbqFdT/JDbk6t20JvgexRk0zFVQ3CnaOgmAmhMmoxs=; b=bCRRPyft33sR9MsWFEWMb3qG6RzKSkN+oqUsXySqnKp6kBuHstEjHWCYuZNJ238ogy VoZ22t+vEfeaiJIwH9cK3wa9LoPHzBelud1kdkzpe+xWkK/K0P+aBuZEC4RZLz97RXGp b38HayTOrOEAMSPsLt9mlkgV26D9HFDELiL9NFuePvIW1LCppxRvt/RNhDdAjpBPOGEY qhkqgKUNENWgWk5bP2WHobXLv44dNL4cjcEikT52zbGu4Ko9plVqp+Z2seNWIPS8JOgs 1s160vGuWZ2RSpZ8Xehyd8qIciyYddTHLeXvQxhQ7cd4CtFuB+YmEMbx+/E5eXe7E9l0 Fu6w== X-Gm-Message-State: AFqh2kp0T1CmJD6RnGWLXqKG9nqnMz+HmXncc4NcVY3xpYNlM9VhEiyc n/8Exxbh1QQEalfB4EpuvDQ= X-Google-Smtp-Source: AMrXdXvGslnAVKLoPH+t01+Ripv46/ISSZmTMAWZank9F3QWH6C5s89RkS8L/E/8JmO84IbTeA0dtA== X-Received: by 2002:a92:c26f:0:b0:30d:6de3:268b with SMTP id h15-20020a92c26f000000b0030d6de3268bmr36191703ild.19.1673638263209; Fri, 13 Jan 2023 11:31:03 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.31.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:31:02 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 19/20] dyndbg: unwrap __ddebug_add_module inner function NOTYET Date: Fri, 13 Jan 2023 12:30:15 -0700 Message-Id: <20230113193016.749791-20-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The inner func has a base arg which is unused in the body, so theres no point in having the inner fn. Its one-time purpose was to expose a wider interface to the internal caller: dynamic_debug_init(), to allow communicating each module's offset in the builtin _ddebug[] table. That purpose was obsoleted by cited commit, when ddebug_add_module() was converted to pass a *ddebug_info, which is used as a cursor by the caller. TODO: the cited commit gives another reason for base, to provide an index in support of de-duplicating column data. Refresh that patchset to see if its still true. Fixes: b7b4eebdba7b ("dyndbg: gather __dyndbg[] state into struct _ddebug_info") Signed-off-by: Jim Cromie --- lib/dynamic_debug.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 19bf66229d45..eb1fb10d7272 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -1348,8 +1348,7 @@ static void ddebug_attach_client_module_classes(struct ddebug_table *dt, const s * Allocate a new ddebug_table for the given module * and add it to the global list. */ -static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, - const char *modname) +int ddebug_add_module(struct _ddebug_info *di, const char *modname) { struct ddebug_table *dt; @@ -1391,11 +1390,6 @@ static int __ddebug_add_module(struct _ddebug_info *di, unsigned int base, return 0; } -int ddebug_add_module(struct _ddebug_info *di, const char *modname) -{ - return __ddebug_add_module(di, 0, modname); -} - /* helper for ddebug_dyndbg_(boot|module)_param_cb */ static int ddebug_dyndbg_param_cb(char *param, char *val, const char *modname, int on_err) @@ -1538,7 +1532,7 @@ static int __init dynamic_debug_init(void) mod_ct++; di.num_descs = mod_sites; di.descs = iter_mod_start; - ret = __ddebug_add_module(&di, i - mod_sites, modname); + ret = ddebug_add_module(&di, modname); if (ret) goto out_err; @@ -1549,7 +1543,7 @@ static int __init dynamic_debug_init(void) } di.num_descs = mod_sites; di.descs = iter_mod_start; - ret = __ddebug_add_module(&di, i - mod_sites, modname); + ret = ddebug_add_module(&di, modname); if (ret) goto out_err; From patchwork Fri Jan 13 19:30:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Cromie X-Patchwork-Id: 13101544 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C21BC678D4 for ; Fri, 13 Jan 2023 19:32:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C588810EB16; Fri, 13 Jan 2023 19:31:16 +0000 (UTC) Received: from mail-io1-xd29.google.com (mail-io1-xd29.google.com [IPv6:2607:f8b0:4864:20::d29]) by gabe.freedesktop.org (Postfix) with ESMTPS id 34C3C10EAF4; Fri, 13 Jan 2023 19:31:05 +0000 (UTC) Received: by mail-io1-xd29.google.com with SMTP id d22so2109999iof.5; Fri, 13 Jan 2023 11:31:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=OEx7az1CRhHYvlWmc4MRaaF+3uZ2KBGutBbs32Sne1U=; b=FhAzt65WMpkrR6NV7Xt7h3ayQ1k6xsxgl2OalNQTIYKgl5qLokbMgec7unfxHUd5a2 Zi2tqvpd/Z0fJiYaNTSbz+ceCWeMuAQuIhmBRPLiWl3KdbVX2kGFYGCHAiVJjr6ZFXpK mulX6DdxFu020z1xE5CiSVPtwxJpydyjshfktoCjVArtKCZA8yPcSH88ouHDogFd/JZ6 rhXjSGns5MY8y08NphDOjkYOd974+6OzNEPafa77gOzRX4bR9iudqz55O2o103eOfQ6G mS9rmEG4LRNWN/KNHw+s9OXyRwKB/s7qNVixaonck4QDZuMn0l9UZUSn2ax5xbfb0Eko atJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=OEx7az1CRhHYvlWmc4MRaaF+3uZ2KBGutBbs32Sne1U=; b=zkUajdAZEcIfYSZgmvRkpoBCj9ZmHq6dwVh8iMsRs7ZppOTPtKDhs10crndOW2OBfO 1aVRrFCY1B7UFK3KB+Epm6FjL8C0VvIQH01nGdNi9cWtb6dxrogKRZa1vqr+o+415Y0P T1ekzoR4frWjeYNH8u8sauwqjyvs2h3LnUOBLaMQ6XgmGyN4tDUGMs61eTFp1x5aoMXw y/9fGScukjnpnUK/vo1/AKZQh+CGQL6y3nogojqNVJSxZzZjgWXUB94f348p7VqbufcP jOy5aok/z+fv3txjvGp54Fxh9DOoKduNZAUT9RQx9nO0isJZOJNntru5kVM8iQ+bDDTG XqRw== X-Gm-Message-State: AFqh2kqbzmN93B4zlESUpS1IkBGfYn9N+Pi1ARJ5bxl8e90+lHbi/74s 4085zcVF8GUpTfVYfkmjTqA= X-Google-Smtp-Source: AMrXdXvqPlUeQL8K6/DCtOPddlhNQBa8PJpqgD9AwZBGJqC+QeZ1GxQF/yHWpBEPmeucGj1gmAkTPw== X-Received: by 2002:a05:6602:298a:b0:6e2:f989:5a8a with SMTP id o10-20020a056602298a00b006e2f9895a8amr50131385ior.11.1673638264314; Fri, 13 Jan 2023 11:31:04 -0800 (PST) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id e32-20020a026d60000000b0039e583abceasm6497289jaf.68.2023.01.13.11.31.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Jan 2023 11:31:03 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH v2 20/20] jump_label: RFC - tolerate toggled state Date: Fri, 13 Jan 2023 12:30:16 -0700 Message-Id: <20230113193016.749791-21-jim.cromie@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230113193016.749791-1-jim.cromie@gmail.com> References: <20230113193016.749791-1-jim.cromie@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , jani.nikula@intel.com, daniel.vetter@ffwll.ch, jbaron@akamai.com, seanpaul@chromium.org, gregkh@linuxfoundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" __jump_label_patch currently will "crash the box" if it finds a jump_entry not as expected. ISTM this overly harsh; it doesn't distinguish between "alternate/opposite" state, and truly "insane/corrupted". The "opposite" (but well-formed) state is a milder mis-initialization problem, and some less severe mitigation seems practical. ATM this just warns about it; a range/enum of outcomes: warn, crash, silence, ok, fixup-continue, etc, are possible on a case-by-case basis. Ive managed to create this mis-initialization condition with test_dynamic_debug.ko & _submod.ko. These replicate DRM's regression on DRM_USE_DYNAMIC_DEBUG=y; drm.debug callsites in drivers/helpers (dependent modules) are not enabled along with those in drm.ko itself. Heres that "opposite" state, occurring: :#> echo 1 > /sys/module/test_dynamic_debug/parameters/p_disjoint_bits [ 235.258452] dyndbg: bits:0x1 > *.p_disjoint_bits [ 235.258908] dyndbg: apply bitmap: 0x1 to: 0x4f for '*' [ 235.259351] dyndbg: query 0: "class D2_DRIVER -p" mod:* [ 235.259799] dyndbg: split into words: "class" "D2_DRIVER" "-p" [ 235.260290] dyndbg: op='-' flags=0x0 maskp=0xfffffffe [ 235.260720] dyndbg: parsed: func="" file="" module="" format="" lineno=0-0 class=D2_DRIVER [ 235.261418] dyndbg: good-class: test_dynamic_debug.D2_DRIVER module: test_dynamic_debug nd: 32 nc: 4 nu: 0 [ 235.262276] dyndbg: class-ref: test_dynamic_debug_submod.D2_DRIVER module: test_dynamic_debug_submod nd: 32 nc: 0 nu: 4 [ 235.263178] jump_label: found alternate op at do_cats+0x16/0x180 [test_dynamic_debug_submod] [00000000ba944cc2] (0f 1f 44 00 00 != e9 e1 00 00 00)) size:5 type:0 [ 235.264431] dyndbg: processed 1 queries, with 2 matches, 0 errs [ 235.264951] dyndbg: bit_1: 2 matches on class: D2_DRIVER -> 0x1 [ 235.265444] dyndbg: query 0: "class D2_KMS -p" mod:* [ 235.265869] dyndbg: split into words: "class" "D2_KMS" "-p" [ 235.266337] dyndbg: op='-' flags=0x0 maskp=0xfffffffe [ 235.266767] dyndbg: parsed: func="" file="" module="" format="" lineno=0-0 class=D2_KMS [ 235.267432] dyndbg: good-class: test_dynamic_debug.D2_KMS module: test_dynamic_debug nd: 32 nc: 4 nu: 0 [ 235.268264] dyndbg: class-ref: test_dynamic_debug_submod.D2_KMS module: test_dynamic_debug_submod nd: 32 nc: 0 nu: 4 [ 235.269142] jump_label: found alternate op at do_cats+0x1b/0x180 [test_dynamic_debug_submod] [00000000e8d6c160] (0f 1f 44 00 00 != e9 c4 00 00 00)) size:5 type:0 [ 235.270384] dyndbg: processed 1 queries, with 2 matches, 0 errs RFC: Ive hit this case a few times, but havent been able to isolate the when and why. warn-only is something of a punt, and I'm still left with remaining bugs which are likely related; I'm able to toggle the p-flag on callsites in the submod, but their enablement still doesn't yield logging activity. CC: Jason Baron CC: Peter Zijlstra Signed-off-by: Jim Cromie --- heres the Fatal kernel bug: (its on a -dirty kernel) [ 2831.639643] dyndbg: good-class: test_dynamic_debug.D2_CORE module: test_dynamic_debug nd: 32 nc: 4 nu: 0 [ 2831.641316] dyndbg: class-ref: test_dynamic_debug_submod.D2_CORE module: test_dynamic_debug_submod nd: 32 nc: 0 nu: 4 [ 2831.642048] jump_label: Fatal kernel bug, unexpected op at do_cats+0x11/0x180 [test_dynamic_debug_submod] [00000000fa724232] (0f 1f 44 00 00 != e9 fe 00 00 00)) size:5 type:0 [ 2831.643077] ------------[ cut here ]------------ [ 2831.643537] kernel BUG at arch/x86/kernel/jump_label.c:73! [ 2831.643902] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 2831.644248] CPU: 1 PID: 425 Comm: bash Tainted: G E 6.1.0-tf2-00021-gbe37efe8728f-dirty #696 [ 2831.644862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 [ 2831.645431] RIP: 0010:__jump_label_patch.cold+0x24/0x26 [ 2831.645773] Code: 83 e9 ef 00 ac fe 48 c7 c3 20 4c 5c 85 41 56 45 89 f9 49 89 d8 4c 89 e9 4c 89 ea 4c 89 ee 48 c7 c7 00 70 c5 82 e8 d7 1a 01 00 <0f> 0b 41 54 45 31 e4 55 48 89 fd 53 bb 00 00 00 80 48 81 c3 00 20 [ 2831.646896] RSP: 0018:ffffc9000101f738 EFLAGS: 00010282 [ 2831.647242] RAX: 00000000000000a2 RBX: ffffffff855c4c20 RCX: 0000000000000000 [ 2831.647702] RDX: 00000000000000a2 RSI: ffffffff81294fc4 RDI: fffff52000203ede [ 2831.648155] RBP: ffffc9000101f778 R08: 0000000000000003 R09: ffffc9000101f4ff [ 2831.648626] R10: fffff52000203e9f R11: 78656e75202c756a R12: ffffffff855c4c20 [ 2831.649096] R13: ffffffffc0250011 R14: 0000000000000000 R15: 0000000000000005 [ 2831.649498] FS: 00007fe4014aa740(0000) GS:ffff88805ae00000(0000) knlGS:0000000000000000 [ 2831.649894] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2831.650175] CR2: 00007f9c326e6c08 CR3: 000000000ff59000 CR4: 0000000000750ee0 [ 2831.650520] PKRU: 55555554 [ 2831.650667] Call Trace: [ 2831.650793] [ 2831.650903] ? do_cats+0x11/0x180 [test_dynamic_debug_submod] [ 2831.651195] arch_jump_label_transform_queue+0x43/0xa0 [ 2831.651450] __jump_label_update+0x9b/0x1b0 [ 2831.651670] static_key_disable_cpuslocked+0x9f/0xd0 [ 2831.651917] static_key_disable+0x16/0x20 [ 2831.652117] ddebug_change+0x45d/0x5c0 --- arch/x86/kernel/jump_label.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/arch/x86/kernel/jump_label.c b/arch/x86/kernel/jump_label.c index f5b8ef02d172..9175f7e8c267 100644 --- a/arch/x86/kernel/jump_label.c +++ b/arch/x86/kernel/jump_label.c @@ -35,7 +35,7 @@ struct jump_label_patch { static struct jump_label_patch __jump_label_patch(struct jump_entry *entry, enum jump_label_type type) { - const void *expect, *code, *nop; + const void *expect, *code, *nop, *alt; const void *addr, *dest; int size; @@ -57,20 +57,28 @@ __jump_label_patch(struct jump_entry *entry, enum jump_label_type type) default: BUG(); } - if (type == JUMP_LABEL_JMP) + if (type == JUMP_LABEL_JMP) { expect = nop; - else + alt = code; + } else { expect = code; - + alt = nop; + } if (memcmp(addr, expect, size)) { /* - * The location is not an op that we were expecting. - * Something went wrong. Crash the box, as something could be - * corrupting the kernel. + * The location is not the op that we were expecting. + * If its the alternate/toggled op, then warn, otherwise + * something went more wrong. Crash the box, as + * something could be corrupting the kernel. */ - pr_crit("jump_label: Fatal kernel bug, unexpected op at %pS [%p] (%5ph != %5ph)) size:%d type:%d\n", + if (memcmp(addr, alt, size)) { + pr_crit("jump_label: Fatal kernel bug, unexpected op at %pS [%p] (%5ph != %5ph)) size:%d type:%d\n", + addr, addr, addr, expect, size, type); + BUG(); + } else { + pr_warn("jump_label: found alternate op at %pS [%p] (%5ph != %5ph)) size:%d type:%d\n", addr, addr, addr, expect, size, type); - BUG(); + } } if (type == JUMP_LABEL_NOP)